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AIBU?

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AIBU to feel uncomfortable calling my MIL's husband Grandpa?

140 replies

GreenAcreFarm22 · 19/06/2026 22:57

My MIL remarried 10 years ago. Her husband (my husband's stepfather) is 15 years younger than she is. Their relationship began while MIL was still married to my FIL, and it's never been entirely clear whether it was an open marriage arrangement or an affair. Around that same period, my FIL passed away.

After FIL died, step-FIL bought a house with MIL, and they both lived off my FIL's estate. The inheritance was very substantial enough that step-FIL stopped working. For context, my husband was already 25 when his father died and living independently, so step-FIL never had any sort of parental role in his life. He certainly never "raised" him.

Fast forward to now. We recently had a baby. MIL and step-FIL are very insistent that he be called "Grandpa." There was no discussion about it, it was simply forced on us and guilt-tripped.

I may be more sensitive about this because my own father died around the same time my husband's father did. I would never want him to be replaced in that way.

The issue is that I simply don't trust this man. Over the years I've become increasingly uncomfortable with how controlling he seems to be towards MIL as she's gotten older - especially financially, and I struggle with the fact that he has essentially lived off my husband's father's money for more than a decade.

Recently, every time we see them, MIL brings up how step-FIL always wanted children but decided not to have them when younger, and how we need to respect that he wants to be called Grandpa since this is really making up for this bad decision of his. It's sometimes multiple times a day when they stay with us.

What also bothers me is that when step-FIL is around, MIL rarely talks about my husband's father, and conversations about either FIL or my own late father seem to get shut down or redirected. It's as though those men are not supposed to be mentioned.

Around the baby, step-FIL is very keen to play the physical role of grandparent. He wants to hold him, be the first to change him (hardly let's me change him when I'm around!), and play with him. He does not even let my MIL have much quality time with the baby. It's quite full on, to the point that it feels fake.

At the same time, he hasn't really shown up in practical ways that I feel my own father would. They don't help with errands when they stay with us, don't offer much emotional support, and generally don't make life easier for us as new parents. When they stay, they leave a messy room and a dirty bathroom. Also, he won't let MIL get any meaningful gifts for the baby - she was always a very generous lady, and now it's a cheap teddy.

Part of me feels guilty because perhaps "Grandpa" is just a title and doesn't matter. Another part of me feels that grandparent relationships are built through love, support, and a genuine place in the family, not something that can be demanded because someone made bad life plans.

Am I being unreasonable to feel uncomfortable with the insistence on the title?

OP posts:
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Fifthtimelucky · 24/06/2026 14:24

The issue here is not the name. It’s that you don’t like or trust your mother-in-law’s husband (work good reason).

Given that he will presumably be playing a grandfatherly role in your child’s life, “Grandpa” does not seem inappropriate, especially as there will be no other grandfather. As a compromise could he be “Grandpa Gavin”?

For what it’s worth, there were three women who played a grandmotherly role in my children’s lives. My mother, my mother-in-law, and my stepmother (who married my father when they were both in their 60s). All three are now dead and much missed.

The first two were known as “Granny”. The third was known as “Granny Jane” which recognised her role but differentiated her from the real ones.

I agree with others about the nappy changing.

NotMeNorI · 23/06/2026 22:48

I'm sorry OP, but OMG no!

No one does nappy changes except parents and care providers (and close family, if YOU choose that) - it's incredibly important to let your child have dignity and privacy so they learn body boundaries. It's clear that you know that what's currently happening is wrong.

This is YOUR child and no one else gets to make decisions for them or impose their will. Titles are earned, not demanded, and you don't need to worry about respecting people who don't respect you.

Not saying that this is where things are headed, but most abuse happens at the hands of family members. Don't ignore your instincts, or the red flags.

You also both deserve to be able to discuss and celebrate your fathers, and have them be part of your child's life. It's bloody hard raising your child without your parent around and you need to be able to do whatever you both can to keep their memories alive - regardless of how this man or your MIL feel about that.

PelucheCat · 22/06/2026 19:44

Also wanted to add, even if he's not a sexual predator, he's still a controller.

Today he's insisting on nappies, tomorrow he'll be insisting on which playgroup, which school....whose child is it? You need to put firm boundaries in, there's so many red flags.

AskingQuestionsAllTheTime · 22/06/2026 12:51

WaitingForMojo
It is up to your dh really what dc call his stepfather.

In the case of my three it was entirely up to THEM what they called their grandparents. We might suggest; they decided.

WaitingForMojo · 21/06/2026 23:29

I have four dc and neither grandfather ever once changed their nappy. Their grandmothers both did, but only if there was a reason, ie, if they were looking after baby without the parents. It would be a massive red flag for me if anyone started insisting/ being keen to change them.

It is up to your dh really what dc call his stepfather.

AskingQuestionsAllTheTime · 21/06/2026 13:52

HumanOfTheWeek · 21/06/2026 10:17

The spectrum of implications there could be, from innocent to not, are exactly the reason why 9/10 of men in this position wouldn’t volunteer to change an unrelated baby’s nappy even if they were somehow curious about the experience or genuinely wanting to help. Volunteering and then insisting/dictating is odd.

Unless neither of the baby's parents is able to do it, volunteering to clean up a baby's genitals when they are covered in urine and faeces is strange behaviour in anyone unrelated to that baby. (Nurses and carers do it as a job, but that is not the case here.)

Men and women all know this. Knowing it makes them look strange, decent ones don't press the point. Only ones who are not decent will do so.

This man is not related to your baby. His behaviour is strange at best.

As for insisting on his right to mess with your baby... No, Insist that he leaves the baby alone, and if he won't, insist that he leaves.

EvieBB · 21/06/2026 12:41

AhMh67 · 21/06/2026 07:35

I find it sad all the implications of what his reason for changing a baby might be.
he has never had kids and wants the chance to experience every part of childcare. Also my husband and I always changed our grandchild it gives the mum a break from it.

I mean, yes, of course that's possible...but still, I wouldn't leave the baby alone with him, it's just not worth the risk

HumanOfTheWeek · 21/06/2026 10:17

The spectrum of implications there could be, from innocent to not, are exactly the reason why 9/10 of men in this position wouldn’t volunteer to change an unrelated baby’s nappy even if they were somehow curious about the experience or genuinely wanting to help. Volunteering and then insisting/dictating is odd.

ReplacementBusDriver · 21/06/2026 09:59

I'm sorry because this sounds horrible but whether you call him Grandad or not is an extremely surface issue compared to absolutely everything else you've put there. Hefty boundaries and don't have them to stay ever again.

Ilovemychocolate · 21/06/2026 09:49

AhMh67 · 21/06/2026 07:35

I find it sad all the implications of what his reason for changing a baby might be.
he has never had kids and wants the chance to experience every part of childcare. Also my husband and I always changed our grandchild it gives the mum a break from it.

Are you for real?

RoseRedorDead · 21/06/2026 09:48

I had a step grandad. My mum's dad died when she was 7 and my gran married someone also 15 years younger a year after my mum married. He was for all intents and purposes ours and my cousins grandad and we lived him. We weren't alive to know our biological grandfather. The parents were always a bit huh about it and would occasionally say he wasn't a real grandad but he was to us. Although he never changed nappies or anything!

My DSs now have the same except through divorce (not us, grandparents) and their step grandad has been a much bigger and positive role in their life than their biological grandfather. They've only seen him about 4 times and they're now late teens. Sometimes family is what we make it

Granny died just before COVID and was buried next to her parents and original husband. A year later (step) grandad died and was buried there too at their request. So she's buried with both husbands and I love it!!

bigboykitty · 21/06/2026 09:07

AhMh67 · 21/06/2026 07:35

I find it sad all the implications of what his reason for changing a baby might be.
he has never had kids and wants the chance to experience every part of childcare. Also my husband and I always changed our grandchild it gives the mum a break from it.

Leave it out. He's not related to the baby. The only person he's helping is himself.

AhMh67 · 21/06/2026 07:35

I find it sad all the implications of what his reason for changing a baby might be.
he has never had kids and wants the chance to experience every part of childcare. Also my husband and I always changed our grandchild it gives the mum a break from it.

EvieBB · 21/06/2026 02:21

AnnaMagnani · 19/06/2026 23:02

WTF unrelated male gets obsessed with changing a baby's nappy?

Never ever let him unsupervised with your child.

I thought this too. Something feels off about this. Better to be safe than sorry...

bigboykitty · 20/06/2026 20:38

A previous poster recommended a Sarah's Law request. Here's the link to the portal. I strongly suggest that you use it.

https://www.police.uk/rqo/request/ri/request-information/sarahs-law/triage/v2/ask-police-for-information-child-sexual-offences/apply-for-information-sarahs-law2/

Somethingtosayagain · 20/06/2026 20:15

If he wants to be a good grandparent he shouldn't have fecked away your child's inheritance.

He does sound like a potential creep also.

Pinkdayss · 20/06/2026 19:21

I actually cannot fathom anyone deciding they would do anything for my baby without me wanting them to.

I was far too protective of them.
If I'd ever had even the slightest whiff of this, I actually cannot imagine how strong my reaction would have been.

My husband would have been quickly put on notice.

Never allow that creep near your baby again.

outerspacepotato · 20/06/2026 18:57

CAll him the guy you don't see anymore because he's giving groomer vibes and red flags.

@GreenAcreFarm22 , have you spoken to your husband?

Somerford · 20/06/2026 17:27

GreenAcreFarm22 · 19/06/2026 22:57

My MIL remarried 10 years ago. Her husband (my husband's stepfather) is 15 years younger than she is. Their relationship began while MIL was still married to my FIL, and it's never been entirely clear whether it was an open marriage arrangement or an affair. Around that same period, my FIL passed away.

After FIL died, step-FIL bought a house with MIL, and they both lived off my FIL's estate. The inheritance was very substantial enough that step-FIL stopped working. For context, my husband was already 25 when his father died and living independently, so step-FIL never had any sort of parental role in his life. He certainly never "raised" him.

Fast forward to now. We recently had a baby. MIL and step-FIL are very insistent that he be called "Grandpa." There was no discussion about it, it was simply forced on us and guilt-tripped.

I may be more sensitive about this because my own father died around the same time my husband's father did. I would never want him to be replaced in that way.

The issue is that I simply don't trust this man. Over the years I've become increasingly uncomfortable with how controlling he seems to be towards MIL as she's gotten older - especially financially, and I struggle with the fact that he has essentially lived off my husband's father's money for more than a decade.

Recently, every time we see them, MIL brings up how step-FIL always wanted children but decided not to have them when younger, and how we need to respect that he wants to be called Grandpa since this is really making up for this bad decision of his. It's sometimes multiple times a day when they stay with us.

What also bothers me is that when step-FIL is around, MIL rarely talks about my husband's father, and conversations about either FIL or my own late father seem to get shut down or redirected. It's as though those men are not supposed to be mentioned.

Around the baby, step-FIL is very keen to play the physical role of grandparent. He wants to hold him, be the first to change him (hardly let's me change him when I'm around!), and play with him. He does not even let my MIL have much quality time with the baby. It's quite full on, to the point that it feels fake.

At the same time, he hasn't really shown up in practical ways that I feel my own father would. They don't help with errands when they stay with us, don't offer much emotional support, and generally don't make life easier for us as new parents. When they stay, they leave a messy room and a dirty bathroom. Also, he won't let MIL get any meaningful gifts for the baby - she was always a very generous lady, and now it's a cheap teddy.

Part of me feels guilty because perhaps "Grandpa" is just a title and doesn't matter. Another part of me feels that grandparent relationships are built through love, support, and a genuine place in the family, not something that can be demanded because someone made bad life plans.

Am I being unreasonable to feel uncomfortable with the insistence on the title?

Sorry OP but I think you need to be a lot stronger and protect your baby.

Why is this man getting to decide who changes nappies and who gets time with the baby? He's being allowed to dictate everything, in all honesty it sounds like there is a very determined predator quickly erasing all boundaries in pursuit of your child.

This man is not related to you or your husband, put a stop to all of it immediately. Let your MIL have a tantrum about it if she wants to. You've been way too passive about this.

ClaredeBear · 20/06/2026 17:08

You need a serious talk with your husband. You’ve barely mentioned him but you need him onside.

B9waiting · 20/06/2026 16:36

SalmonOnFinnCrisp · 19/06/2026 23:23

Trust your instincts.
Even written down it looks like a bag of red flags.

  • Reduce vistis.
  • Start inviting mil over solo - i can predict how that will go...
  • When you see them make sure its out and about ie park / coffee / meal
  • Stop being nice. Say 'no ill change the nappy.' When he insists say 'why are you so desperate to change my child's nappy? Whats wrong with you?' And then give zero fucks if you are accused by mil of "cause a scene" and "upsetting" him

He is doesnt care about basic boundaries or your feelings, you dont need to care about his....

Edited

Love this approach!

AbzMoz · 20/06/2026 15:45

The order of priority is your child’s welfare, your (and DH’s) comfort and then there is a huge full stop. Offence and playing nice do not come into it.

lessglittermoremud · 20/06/2026 14:32

I don’t think my Dad has ever changed a nappy for any of my children, not because he thinks it’s women’s work anything but because when they were that age I was always on hand.
If he had been in sole charge of them he obviously would, he brought up me and my siblings on his own pretty much, but in our family usually babies get passed back to their parents for changing, unless they are obviously busy and then someone will volunteer (usually who ever is closest to the mat/changing bag)
I have step parents that have become part of the family since we’ve all been adults. They are given the title of Nana/Grandad, so my children have a Nana, Grandma and Grannie and then a Grandad, Grandpa and Grandad Fred.
For us they are just names/titles, the children have their favourites obviously, usually due to the amount of time they spend with them or the activities their Grandparents choose to do with them.
I would just call him Grandpa….., whatever his first name is when you are visiting, by the time you limit access because he’s unpleasant and stick with your boundaries over the baby’s personal care, there won’t be that many visits to be worried about what to call him.
How they got together isn’t really anyone business, if it was an affair etc
I’d only be concerned on how their present situation is, if he makes you uncomfortable, advocate for yourself and your child.
Just because your step FIL didn’t choose to have children doesn’t give him a he right to fulfil that role with someone else’s child, and I would have no qualms in saying that to both your MIL and FIL.

Lotsofsnacks · 20/06/2026 14:31

outerspacepotato · 19/06/2026 23:29

Find your spine and shine it up now.

"No, Bob, you're not changing my baby."

"I said no, Bob. "

"Bob, give me privacy to change my baby."

Use ownership language. This is your baby, not his.

This is a red flag. If he gets insistent, ask him just why he wants to see your child's genitals. If he doesn't back off then, you've got a big problem and you're going to have to go lower contact.

Space put those visits more. They're not good guests and they'realing a lot more work for you.

This OP, pls advocate for your son. No respectable family member bulldozers in and takes away nappy change from the baby’s mother obsessively, but doesn’t help out at all in other areas, just this on task only? this feels weird

Pinkdayss · 20/06/2026 14:20

Oh OP, protect that baby.

I would 100% go to the police and check up on him.

You need to spell it out to your husband that your baby is not a substitute anything to this man his mother has foisted on him.

I wouldn't want them visiting again.
Let it blow up.

You need to protect your baby.
His actions are not normal, they are chilling.

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