My sister will wear anyone’s undies, constantly wears my mothers and her boyfriends and used to steal mine. Me and my partner live in a granny flat out the back, but have to use the same washing machine so everyone’s clothes get mixed. One day I noticed my sister was wearing my partners underwear, and told her that they were his. Both she and my mother(who does her washing) say that they thought it was her boyfriends. When I told my partner, he said saw them in her room and said they were he’s but she continued wearing them.

Then they came back to us(my mother must have put them back with my clothes), and he started wearing them. When I told him that I felt uncomfortable about it, and he got mad, claiming that he had no other underwear because I never do the washing. And I overreacting by being disgusted by this. Or would you girls feel the same?

Edit to add; I do wash our own clothes, and have our own baskets but somehow stuff still gets mixed. I also wash every second day, and there was a laundry basket full of clean clothes that I hadn’t folded yet, he was just to lazy to go through it, and was using ‘me not washing’ as an excuse.