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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To not want BIL’s partner to come to our house?

126 replies

chococooo · 06/05/2025 14:14

Basically BIL cheated on his long term partner and had two kids with another woman.

The OW followed BIL home one night and knocked on the door when BIL was out and told BIL’s long term partner everything.

The OW was well aware he was living with his long term partner and had kids with her, he made it clear that it was only a fling and he would never leave his partner.

Obviously his partner left him and after abit he had ended up in a relationship with the OW.

I am friendly with with his ex and she is a good woman who went through a lot in her life, she gave BIL a home when he had nothing, to be honest I am very disgusted that he has treated her like this.

Now BIL wants to bring her round our house and introduce herself to our kids ( 1 year old twins).
Apparently she has been begging BIL to meet me and to get friendly etc.

BIL is my OH’s younger brother.

I have no interest in being friendly with this woman, and I certainly don’t want her in my home.
The ex has told me she began stalking her, writing things online about her etc, basically bunny boiler type stuff.

I don’t want to get involved in all BIL’s drama.
I have said to OH that BIL can come round with the kids but that’s it and I won’t be entertaining her at all.

OH feels awkward and doesn’t know how to tell BIL even though he dosent like the woman either.

AIBU?

OP posts:
nomas · 06/05/2025 14:46

Whyherewego · 06/05/2025 14:23

I'm not sure why you're hating on the OW here.
Of course bloody BIL said it was "only a fling", do you think he was going to say anything else. But equally do you think that this OW was told it was a fling? After 2 kids?

You may have strong opinions on those who have affairs, and that's absolutely fair and fine. But BIL is the perp here. And you don't know what yarns he spun to this OW.

So feel free to not have her round, your house your guests but personally I think you're a hypocrite for saying she's not welcome but he is

It’s not hypocrisy for OP to be aware that she can’t stop her DH and BIL’s relationship, but she can choose not to have a relationship with him or the OW.

It’s not OP’s job to host BIL and befriend this woman.

Betterdeals · 06/05/2025 14:47

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Notsosure1 · 06/05/2025 14:48

GRex · 06/05/2025 14:26

It's a bit confusing but sounds like your DH has additional nieces or nephews that he hasn't met. He should meet then, though neutral territory or their house is fine for this.

It's good to stand by your friend who is now BIL ex, but while you know he was cheating it's worth remembering that you don't actually know the new partner nor her children. She may be perfectly nice, or have simply seemed wobbly because she had kids in an unstable situation. BIL's ex will not be a reliable witness for you here. If it were me, I'd meet her myself before judging what to do next.

Wobbly bc she had kids in an unstable situation - so she went to purposefully blow up another woman’s situation to make hers unstable and wobbly. She’s a bitch.

JHound · 06/05/2025 14:48

chococooo · 06/05/2025 14:44

@Cctviswatchingme001 I’m not being judgemental as it was made my business as I am pressured to meet a woman who has been stalking my friend with the police now being involved.

@Takersgonnatake Lol

The police are involved?

Oh hell no. You don’t want to make friends with a deranged bunny boiler - keep your distance.

Profhilodisaster · 06/05/2025 14:51

I'd give both of them a swerve, does your BIL know about the stalking and police involvement?

Betterdeals · 06/05/2025 14:52

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beAsensible1 · 06/05/2025 14:55

No. Tell DH to meet them outside for lunch somewhere.

Cucy · 06/05/2025 14:58

I definitely wouldn’t have her in my home.

Why can’t you go round to their house?

Surely if they’re so desperate to be involved with the family, then they should be making an effort and inviting you all round.

I would meet (not at yours) but only for the kids sake so they get to know their cousins.

My sister cheated and although I completely disagree with her actions and don’t like her DP, I am pleasant for the kids sake.

Unless she’s absolutely awful to you, then it should be quite easily to be civil.
I would just have firm boundaries like them not coming over to yours and not being over friendly.

BMW6 · 06/05/2025 14:59

Well I wouldn't have either of them anywhere near me!

They're BOTH to blame so BOTH should be NC.

SonK · 06/05/2025 15:01

I wouldn't want to meet her either OP.
Stand your ground x

MaggiesShadow · 06/05/2025 15:03

You don't have to meet her and you certainly don't have to have her in your home. If DH is comfortable with you taking things into your own hands, I would message BIL directly and tell him that. Say you would never put yourself between your DH and his brother, but you feel no obligation to be involved with him and his mistress.

Dweetfidilove · 06/05/2025 15:06

The OW was well aware he was living with his long term partner and had kids with her, he made it clear that it was only a fling and he would never leave his partner.

Kudos to his ex for dumping his sleazy ass. Who made him arbiter on fucking around and keeping the relationship 🙄.

Anyhoo- if nothing else, the OW sounds a right nutter - following him home / stalking the ex... I'd want no part of this mess, so wouldn't have her in my home either.

MyDeftDuck · 06/05/2025 15:12

“OH feels awkward and doesn’t know how to tell BIL even though he dosent like the woman either.”

That’s easy……he opens his mouth and says politely that whilst brother and children are welcome to visit his current GF is not! Sorted.

Noshowlomo · 06/05/2025 15:14

God this is hard. But nope, “I don’t want anyone in my house who is a stalker. She could be dangerous”. If that’s factual then it’s fair enough.
Do the kids all know each other?

JoyousEagle · 06/05/2025 15:19

He made it clear it was only a fling????? They had two children! You phrase it like it’s a defence of him that he said that.

Whyherewego · 06/05/2025 15:20

nomas · 06/05/2025 14:46

It’s not hypocrisy for OP to be aware that she can’t stop her DH and BIL’s relationship, but she can choose not to have a relationship with him or the OW.

It’s not OP’s job to host BIL and befriend this woman.

Agreed, it just initially read like she was ok for bil to come over and hang out with the family and was focused on the OW as the bad person

ExtraOnions · 06/05/2025 15:23

She might be around for the next 50 years … the children are your nieces / nephews, and cousins to your children, they also haven’t don’t anything wrong, so shouldn’t be denied a relationship with family.

Think carefully about what’s right, not based on how their relationship started, or anything your ex-SIL says (at some point she will move on, with a new partner, and you will be relegated to the wings), just what the right thing to do is now, and in the future.

People have affairs all the time, and many long-term relationships started with an act of infidelity.. I’ve never thought people should be punished forever.

Avoid taking sides as much as you can.

LlynTegid · 06/05/2025 15:23

No is a complete sentence in this case.

PhilippaGeorgiou · 06/05/2025 15:24

Whyherewego · 06/05/2025 14:23

I'm not sure why you're hating on the OW here.
Of course bloody BIL said it was "only a fling", do you think he was going to say anything else. But equally do you think that this OW was told it was a fling? After 2 kids?

You may have strong opinions on those who have affairs, and that's absolutely fair and fine. But BIL is the perp here. And you don't know what yarns he spun to this OW.

So feel free to not have her round, your house your guests but personally I think you're a hypocrite for saying she's not welcome but he is

I have to agree with this. Especially since there are children involved, and if she isn't welcome then neither are the children. If I was banning anyone, it would be him.

Betterdeals · 06/05/2025 15:24

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S0j0urn4r · 06/05/2025 15:25

But you're okay hanging out with BIL? He made his choices.

bigboykitty · 06/05/2025 15:26

"No thanks"

OriginalUsername2 · 06/05/2025 15:28

All he needs to say it “Chococoo said it’s a no. What can you do..” and then change the subject. Or you can tell him yourself sorry, you’re not up for that at the moment. You don’t need to explain the ins and outs.

OriginalUsername2 · 06/05/2025 15:29

(re: “no is a complete sentence”)

Yeah.. it’s a complete sentence for a toddler throwing a strop. Adults need to add a little more to be reasonable.

ThejoyofNC · 06/05/2025 15:31

I'd text him.

"Hi BIL. I have no interest in meeting X or having any type of relationship with her, she is not welcome in my home. The children can come over any time."