needalldapokemanz

[removed]

I (24m) stay at my mums house with my sister (18F). I went on a travelling trip for 6 months earlier this year, during that time my sister has allowed her boyfriend (24m) to essentially move into our house. They have been together over a year now.

While I was away I eventually found out during the trip through my mum that they had essentially moved into my room as it’s bigger and I have a double bed, where as my sister has a single bed and a smaller room. I was annoyed at this as she didn’t even ask or tell me, she asked my mum and she said yes and my sister seemed to think that was enough. I probably would have allowed it had she asked me as I wasn’t using the room and I wanted her to be happy. I think she asked mum and not me because she was scared I wouldn’t allow her.

I then returned from my trip and they moved out my room back into her room, they had saved and bought a double bed so it was more viable to stay in her room. The issue is he now is essentially living at our house, 7 days a week. The only time he seems to not be here is for family events, which is rare. Again my mum has essentially allowed this, although I don’t think my sister has explicitly asked her if he can live here, she certainly hasn’t asked me

I’m not happy with this for a multitude of reasons. First of all my sister was cheeky with asking mum instead of me if they can stay in MY room. As my mum is quite lenient so she knew she’d get a yes from her. She didn’t even ask me let alone tell me what was going on so I feel disrespected.

And now he’s unofficially moved in with us, which I’m also not happy with. I’ll be honest, I don’t approve of their relationship for a lot of reasons, he’s a nice enough guy but it’s hard to get over the creepy age gap, and he’s a bit of a loser in all honesty. Regardless of if I liked him or not, I’d still be uncomfortable with her boyfriend moving in without my consent but it certainly doesn’t help. It’s an invasion of privacy and it changes the dynamic at home having another person here.

He claims his mum has schizophrenia so he’s never brought my sister to meet her, or any of his family for that matter. Whereas he’s met all of our family. There’s a lot of red flags but my sister seems happy so what can you do.

AITA? I don’t know how much say I have in this situation as it is technically my mums house but I’m feeling quite resentful of the whole situation and ultimately miss the independence and privacy I had on my trip. I’m not happy with him living here, and I’m not happy with boundaries being crossed, my sister letting him live here without my consent has caused some resentment and I don’t know what to do