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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Overly involved brother-in-law

82 replies

DenimTraybake · 10/12/2024 14:17

I currently live with my partner and his twin brother. My partner and I met a year before they bought a house together. We got serious quickly and wanted to settle down, but he was already in the process of buying a house with his brother—a plan they had been working on for years, saving for a deposit, going to viewings, and making offers. When their offer was accepted, I realized I wasn’t entirely comfortable with the situation. At 33, I wanted children soon and a home of our own.

I expressed my concerns, but my partner explained that he had promised to help his brother buy a house and couldn’t break that promise. He said it was only for three years; after that, they would sell, and we’d get a place together. A few months later, COVID hit, and I moved in so we could be together during restrictions. At first, it was tense—I felt like an outsider, his brother resented my presence, and their family and friends seemed to downplay our relationship. It was all about “the twins,” and I was on the sidelines.

After a few difficult months, I moved out, and my partner and I nearly broke up. But life outside the relationship was lonely, and my partner worked hard to win me back. His effort made me realize how much he loved and cared for me, which deepened my love for him. We reconciled, and my relationship with his brother improved. A year later, I became pregnant.

However, things became strained again after our baby was born. His brother became overly involved, giving unsolicited advice, acting like an expert, and making comments about being a “second dad.” Even their mother made a hurtful remark implying my child could just as easily have been his brother’s. His brother would talk about my DD to others as if she were his, saying he could “experience fatherhood” through her. This upset me—I chose my partner to have a baby with, not his brother.

I wanted to move out but found it overwhelming with a newborn. Over time, things improved slightly as my DD grew older. His brother plays with her a lot, which I appreciate, but he often oversteps, trying to parent her in my presence—worrying about her meals or hydration when that’s our responsibility. Sometimes I address it, but other times I’m too tired, which likely sends mixed signals. Constantly reminding him is exhausting.

Now, I’m pregnant with our second child, and my desire to move has intensified. The dynamic between the twins is difficult to navigate—they work together, have always lived together, share friends, and even have a joint bank account (while my partner and I don’t). Small things add up, like Christmas cards addressed only to them or joint presents for their family, which leaves me feeling excluded.
While his brother helps with our DD and my partner relies on him for support, it frustrates me that my partner hasn’t fully experienced solo parenting. This lack of experience made him less empathetic when I struggled early on. Recently, his brother sent me an article about foods to avoid for children, something I doubt he’d send to other parents. I can’t tell if I’m being overly sensitive due to pregnancy or if my feelings are valid.

I don’t feel like we’ve had time to bond as a family of three—it often feels like it’s either me and my DD, or me alone while my partner and his brother bond with her. My partner understands how I feel and has agreed that we’ll move out this year. Still, I can’t help but wonder: am I being too harsh, or are my feelings reasonable?

OP posts:
BruFord · 20/12/2024 02:08

DenimTraybake · 19/12/2024 22:46

I pay into their joint account, which they set-up before I moved in. It's used to pay the bills and mortgage.

Ugh, so you and your children have no security at all. At least it you were married you’d have some rights, but currently they could ask you to leave tomorrow and you’d have to go.

FictionalCharacter · 20/12/2024 03:36

DenimTraybake · 19/12/2024 22:46

I pay into their joint account, which they set-up before I moved in. It's used to pay the bills and mortgage.

Ohhh no no no no! You’re putting your money into THEIR account for them to control. This story gets worse and worse.

Let’s just hope your boyfriend really is serious about moving out. At the moment the primary relationship is between him and his brother, with you as some kind of minor player, baby producer and part-time nanny. And your paying them to run the show together.

Yes it’s great for his brother to help with the baby. It is not at all good for him to interfere, talk about being a second dad and “experiencing fatherhood”. It’s quite disturbing that you talk about being alone at times while the two of them bond with the baby. YOUR BABY! It isn’t necessary for them to “bond” jointly without you. This is all utterly abnormal.

They are so enmeshed that your boyfriend will struggle to adapt when you have your own home and you’re living as a couple. Please be careful. It sounds like you’re largely staying for practical and financial reasons at the moment, having left or considered leaving more than once. This isn’t a solid foundation for your relationship.

Justsayit123 · 20/12/2024 04:15

Why are you paying their mortgage??? Wtf!

Codlingmoths · 20/12/2024 04:18

Cancel the payment into their joint account. You need to save some money here as I don’t think this will end well.

Fraaances · 20/12/2024 04:21

Time to save up and move out. He's not going to do a damn thing until his hand is forced. He's comfortable and he's married to his twin. It's a weird, emotionally incestuous relationship and they have no intention of rocking the boat and growing up.

Yalta · 20/12/2024 04:38

If you move out you can claim housing benefit and UC and will be getting CM for both dc. As well as your p/t job
Look on Entitledto. Pick out a hypothetical rental address and see with your wages what you can claim
If your dp really does love you and wants to live with you, unless you make a stand now and go in your own direction then for him there is no reason to change. There is no reason to mess with the status quo

I have a few sets of twins in my family and can honestly say that it is one of those things that requires you to see both children as individuals . The lazy parenting is when they are treated as one person into teens and adulthood and it can mess some people up if they are never seen as individuals in their own right

Yalta · 20/12/2024 04:39

Stop paying their mortgage

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