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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Inheritance with grandchildren and step grandchildren

361 replies

DogsInThePaddlingPool · 14/08/2026 12:01

My mum has recently told us she has updated her will. She has decided not to leave anything to me or my siblings but to leave it to our children instead. She has explained that as we are all settled and financially stable, she wants to help the younger ones who it will be harder for.

I have 2 children, my brother has 3 children and my sister has 2 children and 2 step children. My mum is leaving equal amounts to her 7 biological grandchildren and then a much smaller amount to my sisters step children. The step children have been in our family since they were 4 and 5 and are now 19 and 20.

My sister has had a row with my mum because she feels her step children should get the same as the rest of the grandchildren. My mum isn’t budging.

My sister wants me and my brother to tell our mum that she is being unfair. We don’t want to get involved and have said it’s her money and her decision.

My sister hasn’t made any contact with any of us for the last month since we said we wouldn’t side with her.

Are we being unreasonable? Is my mum being unreasonable?

OP posts:
Northernlassie123 · 14/08/2026 14:50

waitinginwonderland · 14/08/2026 14:32

It’s also not fair that they should get less on one side if they are also going to inherit from the other though, and people always use that as a reason to deny step relatives on MN.

My DSD is in my will to be treated as a bio child, and the same for her stepdad on the other side. That means she’ll inherit more than her siblings, which many see as unfair. Her siblings have all grown up in houses with their parents together in loving marriages, living in one home, one could argue they have an advantage in that sense? You can’t make it equal in these situations but you can make it as fair as possible.

Agree !! inheriting a bit more is an advantage that slightly makes up for not having been brought up by both parents in the same household.

DogsInThePaddlingPool · 14/08/2026 14:56

SandyHappyPerson · 14/08/2026 14:45

We don’t want to get involved and have said it’s her money and her decision.

I would never do this to my sister, it's basically the same as "I'm alright jack".

The least I would have done is have a word with my mum and tell her designing the will to ensure less value was placed on two of her children was always going to be problematic in their family, and if it made a difference you would be happy for them to get a 9th share instead. You don't have to ask her to change anything to just give your simple opinion on it (assuming you felt that way). I would have then gone back to my sister and a told her what I thought and what I had said, but ultimately it's your mums decision to make and you don't think anything you say will make a difference.

As it stands you have done nothing, and are not going to voice an opinion on it to your mum either, even if you feel a certain way, which you do.

I could never do nothing when it involved my sister and her children, even if ultimately I thought whatever I did would make no difference, I'd at least be empathetic about how they felt at a bare minimum.. not just shrug and say 'not my problem'.

I have spoken to my mum, so has my brother. We have told her that we don’t care how she divides her will and no offence would be taken by us if she chooses to include the step children equally. Her response was ‘noted, thank you.’ This wasn’t enough for my sister, she wanted us to tell our mum that the will was unfair and she needs to change it. We refused and she hasn’t spoken to us since.

OP posts:
PennyPugwash · 14/08/2026 14:58

Your sister is being absolutely ridiculous.
the stepchildren will inherit from their mums family also so they’ll be well looked after. And they’re not being left out, they’re just inheriting less.
I have stepchildren and it wouldn’t even cross my parents mind to include them in their will, nor would I want them
too. They’ve enough coming from their mum eventually.

SandyHappyPerson · 14/08/2026 14:58

A671090 · 14/08/2026 14:32

Are you OPs sister?

God no! But I have two sisters, and like I said my mum wanted to treat one of my sisters differently in her will.

It would have been a commentary on how she lives her life from beyond the grave, and as the executor I didn't want my mums legacy to be one of bad feeling, it was hard enough losing her young, I spoke to her and explained how it would feel for my sister, how it would be for me being the executor carrying out wishes I didn't really agree with, and she reconsidered on her own, I would have carried out her wishes either way.

People on here would have said, stop interfering, stop being grabby, entitled etc, it's her money blah blah bloody blah.. but ultimately my mum would still be dead and we'd be left with the fall out from it, with not one party being unreasonable.

Family is everything to me, and I am the one always striving to keep us together as a family after our mum died, 11 years later and we are closer now than we have ever been but it could have gone the other way.

I personally think how OPs sister treats her 4 children is how anyone else in the family should treat her children, engineering something to purposely go against that would not sit right with me as a sibling.. I would never EVER say 'not my problem', if it's a them problem, it's a me problem.

SixAndJuliet · 14/08/2026 14:58

OP, imo it is cruel of your mum to cause this trouble just to prevent your sister possibly using her inheritance to give a foot up to her sc.

Come on, if she’s caused a big rift between her own children was it really worth it?

Reality is that your sister will now over compensate by making sure the sc have the same advantages potentially causing further rifts and tensions between her children.

Your mum should have left as it was.

Queenncat · 14/08/2026 14:59

Seems fair enough to me - it's her cash her decision.
Her step GC will (might) inherit from their mum / her parents.

DogsInThePaddlingPool · 14/08/2026 15:01

Northernlassie123 · 14/08/2026 14:50

Agree !! inheriting a bit more is an advantage that slightly makes up for not having been brought up by both parents in the same household.

None of my sisters children or stepchildren have both parents in the same household. The bio children saw their mum and dad 60/40 ish. The step children lived with their mum most of the time and saw their dad and my sister some weekends and holidays.

OP posts:
JaspersCarrott · 14/08/2026 15:04

However your sister feels about her mums Will, and you and your brothers opinions, the fact that she couldn't congratulate your brothers daughter on her A Level results is out of order - that would tell me all I needed to know about your sister, and I'd just be leaving her to stew...
Also telling was your mums comment of "noted" when you and your brother mentioned the inheritance, she sounds like shes made her decision, and whilst acknowledging what you've said, nothing will change...your sister needs to be careful - her kids inheritance may end up being distributed elsewhere!

DogsInThePaddlingPool · 14/08/2026 15:04

SixAndJuliet · 14/08/2026 14:58

OP, imo it is cruel of your mum to cause this trouble just to prevent your sister possibly using her inheritance to give a foot up to her sc.

Come on, if she’s caused a big rift between her own children was it really worth it?

Reality is that your sister will now over compensate by making sure the sc have the same advantages potentially causing further rifts and tensions between her children.

Your mum should have left as it was.

My brother thinks that maybe we have just found out who our sister really is. He thinks if she is prepared to have a rift over this, more fool her. If she now treats her bio children differently to favour her step children, then she really is an arse isn’t she.

My mum shouldn’t have to appease my sister. Her SC are still inheriting.

OP posts:
Queenncat · 14/08/2026 15:05

DogsInThePaddlingPool · 14/08/2026 15:04

My brother thinks that maybe we have just found out who our sister really is. He thinks if she is prepared to have a rift over this, more fool her. If she now treats her bio children differently to favour her step children, then she really is an arse isn’t she.

My mum shouldn’t have to appease my sister. Her SC are still inheriting.

Your brother is correct

AuntieBiotics · 14/08/2026 15:06

waitinginwonderland · 14/08/2026 14:29

I agree - some children may not have any biological grandparents! Some may have more than 4 due to remarriage etc! My DSD is very close to my parents but my DHs parents died young, before she was born. She’s also close to her stepdads parents and her Mum’s parents, so in effect has 6 grandparents who love her. More people to love never hurt anyone.

This is total nonsense. Every single person ever born has four biological grandparents.

Whether those grandparents are alive/dead or involved/not does not mean that they do not exist.

Northernlassie123 · 14/08/2026 15:06

DogsInThePaddlingPool · 14/08/2026 15:01

None of my sisters children or stepchildren have both parents in the same household. The bio children saw their mum and dad 60/40 ish. The step children lived with their mum most of the time and saw their dad and my sister some weekends and holidays.

I meant it a general point. If step children in general inherit a bit more because they have step families then good for them after a childhood of navigating that type of situation. I doubt it happens that much t in reality. They will be used to being othered though. It just happens in blended families .

DogsInThePaddlingPool · 14/08/2026 15:07

JaspersCarrott · 14/08/2026 15:04

However your sister feels about her mums Will, and you and your brothers opinions, the fact that she couldn't congratulate your brothers daughter on her A Level results is out of order - that would tell me all I needed to know about your sister, and I'd just be leaving her to stew...
Also telling was your mums comment of "noted" when you and your brother mentioned the inheritance, she sounds like shes made her decision, and whilst acknowledging what you've said, nothing will change...your sister needs to be careful - her kids inheritance may end up being distributed elsewhere!

My brother and SIL are very annoyed over that. My mum would not take away her GCs inheritance, but if my sister continues, my brother reckons she may take away the SCs entirely. I don’t know what she will do and just want everyone to get along.

OP posts:
Widoeeyes · 14/08/2026 15:08

AnneLovesGilbert · 14/08/2026 12:14

Your sister is welcome to try to take from her children’s shares to top up her step kids, even though that’s against her mum's wishes and her own kids may say no but she’s being wildly cheeky asking you to change your mum’s mind. Her strop since you said no tells you a lot. Leave her to stew.

Actually; she’s not. The money is left to her children, and not her. So the children should get it. She has no right to split it with the stepchildren

MrsTerryPratchett · 14/08/2026 15:09

DogsInThePaddlingPool · 14/08/2026 15:04

My brother thinks that maybe we have just found out who our sister really is. He thinks if she is prepared to have a rift over this, more fool her. If she now treats her bio children differently to favour her step children, then she really is an arse isn’t she.

My mum shouldn’t have to appease my sister. Her SC are still inheriting.

Maybe everyone found out who everyone else is. Your mum seems to be fine with creating hurt and drama. Your brother and you seem fine with your sister being upset. Your sister seems unreasonable. Your kids seem unempathetic.

A happy, healthy family would have done everything very differently.

Cosyblankets · 14/08/2026 15:09

The only opinion that matters here is the person who is writing the will. It is their money to do with as they wish. I would be horrified if anyone tried to tell me what to do with my money.

DogsInThePaddlingPool · 14/08/2026 15:09

Northernlassie123 · 14/08/2026 15:06

I meant it a general point. If step children in general inherit a bit more because they have step families then good for them after a childhood of navigating that type of situation. I doubt it happens that much t in reality. They will be used to being othered though. It just happens in blended families .

Edited

Yes, but both sets of kids are step kids. My sisters husband is step dad to her kids too.

OP posts:
sHREDDIES19 · 14/08/2026 15:10

I think she is being absolutely ridiculous and so petty to not get in touch with her own niece is pathetic. You mum is being fair to her 7 biological grandchildren. She is also helping out the step children, who I assume also have both parents and grandparents on the scene? That is for their biological family to deal with. Your sister needs to get a grip.

SixAndJuliet · 14/08/2026 15:11

DogsInThePaddlingPool · 14/08/2026 15:04

My brother thinks that maybe we have just found out who our sister really is. He thinks if she is prepared to have a rift over this, more fool her. If she now treats her bio children differently to favour her step children, then she really is an arse isn’t she.

My mum shouldn’t have to appease my sister. Her SC are still inheriting.

Like I said though, was this really worth it for your mum?

HisNibs · 14/08/2026 15:12

DogsInThePaddlingPool · 14/08/2026 15:09

Yes, but both sets of kids are step kids. My sisters husband is step dad to her kids too.

That being the case, then surely your sisters expects her bio children to inheritance from her husband's parents then? It would be interesting to know her view on that...

SandyHappyPerson · 14/08/2026 15:13

MrsTerryPratchett · 14/08/2026 15:09

Maybe everyone found out who everyone else is. Your mum seems to be fine with creating hurt and drama. Your brother and you seem fine with your sister being upset. Your sister seems unreasonable. Your kids seem unempathetic.

A happy, healthy family would have done everything very differently.

Spot on.

InterIgnis · 14/08/2026 15:13

SixAndJuliet · 14/08/2026 14:58

OP, imo it is cruel of your mum to cause this trouble just to prevent your sister possibly using her inheritance to give a foot up to her sc.

Come on, if she’s caused a big rift between her own children was it really worth it?

Reality is that your sister will now over compensate by making sure the sc have the same advantages potentially causing further rifts and tensions between her children.

Your mum should have left as it was.

It’s the sister that has caused trouble and created the rift, as if she had any right to make such demands of her mother. If she decides to compound it by putting her own children at a disadvantage that too is on her.

Whyherewego · 14/08/2026 15:14

Your mum could leave your and brother shares to your respective kids and then DSIS share to her. She can then do what she wants to vary the will. This then accounts for the possible scenarios ( dsis gets divorced and remarried or whatever ). Just a thought

duckingclueless · 14/08/2026 15:14

Maybe the fairest thing would be to split it 3 ways and then sub divide that to the grandchildren. Agree with her sentiment though.

DogsInThePaddlingPool · 14/08/2026 15:15

MrsTerryPratchett · 14/08/2026 15:09

Maybe everyone found out who everyone else is. Your mum seems to be fine with creating hurt and drama. Your brother and you seem fine with your sister being upset. Your sister seems unreasonable. Your kids seem unempathetic.

A happy, healthy family would have done everything very differently.

Are you here to cause drama? It sounds like it.

My mum just wants to leave her money mostly to her GC, but with some to step children that she doesn’t know that well. I don’t think that should be controversial. The amount she is leaving them isn’t small imo.

I’ve said I’m upset. I am trying to keep in touch with my sister. I sent a message about A levels and a card and gift, so has my brother, That is hardly saying we are ok with her being upset. Don’t even try coming for my kids when their first response was they don’t want to think of their granny dying. But unempathetic? Right.

You have literally slagged off my entire family. I won’t be replying further to the drama you are trying to make.

OP posts:
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