my partner recently moved in, about 2-3 months ago and is saying he's moving back to his parents. This is because my sister has come back twice in those times (the most recent one being last night) with a one night stand. Ive had a word with her and shes not to do that anymore, shes young etc but I dont want some random boy coming into my home.
Anyway, when my partner woke up this morning, my sister and the boy were in the living room, and this pissed him off and he got ready for work and stormed off saying he's moving back to his dads.
Aibu to be upset by that? I almost feel like ive done something wrong when I know i haven't? But its really got to me. He got the majority of his things this evening after work and has gone back to his dads house.
He doesn't seem to understand why I'm upset, ive said to him that ive told my sister shes not to do this anymore, i thought the first time was just a one off so I didnt say anything, so now I've made it clear that its not to happen again.
So aibu to be upset about it?