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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To be pissed off DP has left me with his ex’s child and gone to work?

209 replies

NebulaNomad · 16/03/2026 12:02

My DP has a 15 year old DS with his ex, he was a teenager when he was born as was his ex. They broke up when he was young but they still are good friends and as a result as am I. Some people find that weird but it works and it's better to be civil even though his son is older now.

We have an 8 week old together and his ex has a 4yo and a 16 month old with her ex. She split with their dad when the youngest was a few months old and he has no contact with her or the children. Her 4yo has a heart condition so we help if we can with her youngest when he has appointments so she can focus properly on the 4yo and also due to the hospital being abour an hour and half away by train so it’d be a nightmare with the buggy and it not really being fair on her being cooped up in her buggy

Her 4yo is having his open heart surgery today he's already had a lot of surgeries etc in his short life bless him but his mum is still understandably worried. They have access to the Ronald McDonald (I think it's called?) house but he will be on the HDU/Icu and babies aren't allowed and she doesn't want to leave her 4yo alone who has had major surgery.

We agreed to have her, my stepson is also here obviously. DP has paternity leave of up to 6 months but he has only taken a month so far and is looking for more during the summer so we can go on holiday with our baby and his son.

Anyway, he booked this week as AL as we are having little one for a minimum of a week as the 4yo is likely to be in hospital for at least a week. DP has said he will take things whatever she needs and will be with the 4yo for a few hours so she can have a break but mostly it'll be just his ex as her family are abroad

Except... He's gone into work today because he's “short staffed” so I'm here with a 16mo who just wants to run around and my 8 week old. I know parents have this age gap but this isn't what I agreed to

Aibu to be pissed off?

OP posts:
Catcatcatcatcat · 16/03/2026 14:42

Tell him if he ever pulls that stunt again, you will bring DSC to his work and leave them at reception.

WhatAreYouDoingSundayBaby · 16/03/2026 14:43

JLou08 · 16/03/2026 14:37

It's weird that your title is "ex's child" but the post says the mother is your friend and you and DP both agreed to care for the child. The title is quite misleading, or do you feel your DP has more responsibility for the child than you do because it's his ex's?

Obviously the main link between them all is that this woman is the mother of OP's DP's older son?? That is the reason why they support her in the manner they do, not because they are all friends.

Getting along with your DP's ex, being friendly and helping out here and there is not the same as the ex being on of OP's actual friends. It is disingenuous to pretend to not see the difference.

Amandasummers · 16/03/2026 14:46

Honestly, I would be happy to do this and I wouldn’t be pissed off of it were me, everybody is different so you’re going to get replies in both directions here!

HelloSkeletonFace3 · 16/03/2026 14:52

You're doing such a kind thing for this woman and I hope the surgery is a success for her child. It is so good for your stepson that you are all behaving as a family, kudos to you for making this work - truly.

I suspect if he had asked you, you would have said it wasn't ideal, but handled it for the day. That it was assumed you were default daycare is frustrating, and I'm sure you're exhausted.

nomas · 16/03/2026 14:53

Amandasummers · 16/03/2026 14:46

Honestly, I would be happy to do this and I wouldn’t be pissed off of it were me, everybody is different so you’re going to get replies in both directions here!

No, you wouldn’t be happy, or you’ve forgotten what it is to have a tiny baby.

Ethil · 16/03/2026 14:53

Amandasummers · 16/03/2026 14:46

Honestly, I would be happy to do this and I wouldn’t be pissed off of it were me, everybody is different so you’re going to get replies in both directions here!

I’d be happy to do it but simultaneously pissed off if my husband was supposed to be there too but went to work instead, without even discussing it with me.

nomas · 16/03/2026 14:54

HelloSkeletonFace3 · 16/03/2026 14:52

You're doing such a kind thing for this woman and I hope the surgery is a success for her child. It is so good for your stepson that you are all behaving as a family, kudos to you for making this work - truly.

I suspect if he had asked you, you would have said it wasn't ideal, but handled it for the day. That it was assumed you were default daycare is frustrating, and I'm sure you're exhausted.

Why do you assume OP would have said yes? It’s a shitty thing to expect a new mum to do.

Roosch · 16/03/2026 14:56

Tigercrane · 16/03/2026 14:20

Can't the 15 year old help out more? Kids of 15 used to already be at work 30 /40 years ago. Can't he take the 16 month year old out to park help get her to sleep and it's his sibling.
I would be annoyed but think you are doing a really nice kind thing helping the ex out.

Agree with this.

The 15 year old is the half-brother of this toddler and is the next closest relative if their mother is unavailable.

You and your partner are both unrelated to the toddler and have no responsibility.

Roosch · 16/03/2026 14:59

Catcatcatcatcat · 16/03/2026 14:42

Tell him if he ever pulls that stunt again, you will bring DSC to his work and leave them at reception.

I think the tricky thing is that your partner is not responsible for this toddler either.

In this situation I would contact the toddler’s mother to let her know the situation. She can absolutely look after her own toddler while waiting in hospital. Or she needs to sort out alternative childcare.

twentyeightfishinthepond · 16/03/2026 15:00

He’s being unreasonable but just to point out he is your partner’s child, not only his ex’s child.

Tableforjoan · 16/03/2026 15:03

twentyeightfishinthepond · 16/03/2026 15:00

He’s being unreasonable but just to point out he is your partner’s child, not only his ex’s child.

The toddler is not the husband’s child. It is his ex partners child as is the 4 year old in surgery.

Basically strangers to op and the half siblings of ops dh’s oldest child.

The father of the two children is doing bugger all, while op picks up the slack for a toddler.

CarbGoading · 16/03/2026 15:04

Theres no way I'd be going into work during annual leave while supporting my own baby and someone elses small child while their sibling is having heart surgery. People are always the priority! I'd be giving the other child so much attention and distraction, not leaving them with someone who will be understandably distrated by their 8 week old baby!

JustMarriedBecca · 16/03/2026 15:04

Starlight1979 · 16/03/2026 12:28

The mother who is with her 4 year old child under-going open heart surgery?

Come on.

I agree it's not ideal but it sounds like all of the adults have a good relationship and help each other out so, whilst it's a huge pain in the arse, if DH is otherwise a brilliant, hands on dad then I'd let this one slide and just look after the children for the day. But I would be telling DH it's a one off and he can't keep going into work when he's on AL....

Then he shouldn’t be making please promises of watching his ex’s other child.

The OP says "we" agreed to look after her. Not just her husband.

This.

They all have a good relationship. Yes it's not ideal but it takes a village. This is one of those times.

I'd willingly bend over backwards to help out any parent whose other child is having open heart surgery even without the fact my family has links with their because of a shared older sibling.

I can't believe some of these replies. One day where the kids watch TV and you battle on through is ok.

Sensiblesal · 16/03/2026 15:04

I would reframe this in your mind.

you sound like a good friend to your partners ex & so see it as you caring for your friends child whilst she is probably going through the worst day imaginable.

hubby is being a bit shit but maybe the short staffing is giving him no choice (depends on level of his job here)

your rough day is nothing in comparison to your friends & you are really doing a wonderful thing & giving her one less thing to worry about.

tell hubby he needs to pull his weight for rest of the week though!

sounds like you are both caring people & I would rather be like you than someone who would be posting I was asked to do this but no way cos its not my problem.

myglowupera · 16/03/2026 15:05

Starlight1979 · 16/03/2026 12:31

I think it's absolutely lovely.

Well then if it’s so lovely the mum can return the favour and provide lots of free childcare and look after her ex’s child with OP.

RedRock41 · 16/03/2026 15:13

End of the day a 4yr old going through major surgery. That’s overriding. You were great to even offer to have the other two but deal was with support by sounds of it.

This is on your DH. Tell him you are still a new Mum and recovering too so no more slopping off to work. He agreed so is needed on home front - end of. Good on you doing the best you can today but he has let everyone down.

If orders don’t go out then maybe Mgt will do something about the slackers. He maybe was glad to get the work call thinking 💭 easier than home.

Stressedoutmummyof3 · 16/03/2026 15:20

Why are people suggesting the OP gets her teenage SS to help? None of the children are his, none are his responsibility. Was he involved in the decision for his parents to have other children? No he wasn't so why should he be used for childcare because his dad can't keep a simple promise?
The only person that needs to come home is her partner. He needs to grow a pair and tell work he's on AL so he can't help. Why is he being so wet when it comes to work?
I wouldn't put any of this on the 4 year olds mum but I would tell your partner he needs to be home for the rest of the week or find alternative childcare for the 16: month old. Looking after children of those ages is really hard, especially when they aren't your children.

CautiousLurker2 · 16/03/2026 15:21

NebulaNomad · 16/03/2026 13:42

He wouldn't lose his job by bot going in when he had booked AL as the people who are constantly off “ill” (but aren't actually) have nothing done and one of them is also in a relationship with one of the managers out the office so of course he doesn't lose his job. DP however barely has days off sick, I think the only days off in the 6/7 years he's been there were due to him testing positive for covid (at work) and then having to self isolate. He rarely gets ill but he goes in with colds etc instead of just taking days off

I can't take them to the park, baby hates the pram as it is and I wouldn't be able to push 2 prams, stepson is at an after school club today and DP doesn't finish work until 5 and won't be back til half past or later if he hasn't finished something off

In this case, yes I’d be raging at him. It feels as though he agreed you would both look after ex’s toddler but actually made sure he was out. Maybe even planned it.

I’d not be yelling at or issuing ultimatums to ex’s ex partner (the one in hospital with her child) as others suggest, though. This is about your DH/DP. It’s him you need to rip a strip out of.

NebulaNomad · 16/03/2026 15:23

twentyeightfishinthepond · 16/03/2026 15:00

He’s being unreasonable but just to point out he is your partner’s child, not only his ex’s child.

The 16mo isn't DP’s, his 15 year old is but he was supposed to be here this week anyway as per the arrangement and he's at school so not really any bother

OP posts:
BloominNora · 16/03/2026 15:33

I think you need to separate two things out here - you said in the OP that you were good friends with DPs ex as well and there was lots of 'we look after her youngest' and 'we agreed to have the toddler while the 4 year old was in surgery'.

Lots of people saying that you should not have the toddler again or if DP won't take his leave send the toddler back to mom which is patently ridiculous,

I know you said that you wouldn't have agreed if your DH hadn't taken leave, but that is not her problem, so just fix that in your mind that you are doing what I am sure is a very very appreciated favour for your friend at a very difficult time.

When the 15 year old is back from school get him to help out playing with his siblings to give you a bit of break.

When DH is back, and the little ones are in bed, you need to have a proper grown up conversation with him about how you feel about this. Tell him he needs to be off the rest of the week as promised.

Depending on what he says and what he agrees to do will tell you exactly where you stand moving forwards and you can make decisions based off that information.

ELMhouse · 16/03/2026 15:34

PenelopeChipShop · 16/03/2026 13:48

I think this is a really complex one to be honest. These are exceptional circumstances - a very young child is having open-heart surgery. It is really good of you and your partner to help. He does sound like a good dad and partner overall.

However, suddenly exiting the house when you (not unreasonably) assumed the two of you would be doing this favour TOGETHER is a bit if a shock, especially when you are a brand-new mother yourself. There isn't much you can do in the present moment (other than use the tv/iPad and have as easy a day as you can!) but you should definitely talk about this with your partner later.

My concern would be how easily he is dumping the work of parenting onto the nearest available woman when it was something HE agreed to! I also agree that the work context matters here - if he's a bed manager in a hospital or a heart surgeon it's slightly different to if he has a standard management job and just doesn't want to upset his boss. If he's self-employed and running a business, I get it more as there's no backup and unhappy clients can have a serious effect down the line.

In short, even though some posters are trying to make out this is cut-and-dried, I don't think it is. Talk to him, be honest about your feelings, make it clear you expect HIS hands-on help if the two of you are babysitting the ex's kids. No matter what his job is, he can't reasonably volunteer 'us' and then make it 'you'.

Having read a couple of OPs updates, I think this reply is really thought out.

we didn’t have enough info on your DPs job and the way you phrased it possible gave the view it was his business of sorts and wasn’t 100% clear that he just up and left to go to work without discussion.

i think I agree with this poster, get on with today as you are doing a wonderful thing and don’t lose sight of that. Your partners ex must be going through hell and you are being the most fantastic friend by helping her out.

the issue here is that your partner did not discuss with you his plans for the day so you could both mutually come up with a plan, he just had an expectation of you and that’s not on. That is what you need to discuss with him tonight and talk through the plan for the rest of the week. You are clearly someone who cares and had compassion, this is not a weakness to be exploited by your DP tomorrow or in the future.

have a clear discussion when he gets home and reset your expectations.

i hope you manage through the day ok.

FigurativelyDying · 16/03/2026 15:37

beAsensible1 · 16/03/2026 13:35

That is what having a village is. They are his child siblings and one is having open heart surgery.

Exactly. This, people, is what they mean when they talk about support networks! This is the village. This is what you will miss out on because you “go ballistic” or refuse to look after children because they have “no blood ties” to your child. When you look back over your life and wonder where everyone went.

OP, I can see you are cross with your DP, but it’s just one day. I love the sound of your two families and the way you support your partner’s ex. I think you are brilliant. Poor woman. I can only imagine her anxiety.

nomas · 16/03/2026 15:38

FigurativelyDying · 16/03/2026 15:37

Exactly. This, people, is what they mean when they talk about support networks! This is the village. This is what you will miss out on because you “go ballistic” or refuse to look after children because they have “no blood ties” to your child. When you look back over your life and wonder where everyone went.

OP, I can see you are cross with your DP, but it’s just one day. I love the sound of your two families and the way you support your partner’s ex. I think you are brilliant. Poor woman. I can only imagine her anxiety.

A village shouldn’t be women screwed over by men.

If that’s your idea of a village, you keep it for yourself.

Sensiblesal · 16/03/2026 15:39

nomas · 16/03/2026 15:38

A village shouldn’t be women screwed over by men.

If that’s your idea of a village, you keep it for yourself.

The bras don’t need to be burned every day

nomas · 16/03/2026 15:39

twentyeightfishinthepond · 16/03/2026 15:00

He’s being unreasonable but just to point out he is your partner’s child, not only his ex’s child.

Just to point out that you should read the post properly.