Hello reddit, my boyfriend (31m) was home with my sister (19f) while I was out and I got home and my sister was locked in the guest room and she told me she had something to tell me. She had been staying over for a couple days.

She said that she looked outside her room window and saw my boyfriend swimming naked in our backyard pool, and she saw everything. She said that later she was in the kitchen and he walked in and he wasn’t wearing anything and she could see his junk and he stopped and said hi and waved and she was shocked and he walked by her before going to his room to grab some clothes and then walked naked through the hallway to the shower and had a long shower.

She said she was frozen and embarrassed. She then went to her room and locked herself in until I got home. I confronted my boyfriend and he just said that he felt like skinny dipping because it was hot out and that he lives there so he thought it was fine. It’s my house and he’s living with me and I told him he’s a fucking creep and he didn’t even apologize to my sister when she saw him before and I broke up with him on the spot and told him to gtfo and he told me he can apologize now and not to overreact but I told him we are done.

He wouldn’t leave immediately and I screamed at his face that I’ll call my sister’s bf over and we’ll see what he fucking does to him when he hears what happened and he left. I made my sister promise me that next time she feels uncomfortable to tell me or her bf or someone right away. I told his friend and word spread and now everyone thinks he’s a fucking weirdo and they stopped talking to him and he blew my phone up and I just texted him that his actions have consequences. I told my sister’s boyfriend and he threatened my ex saying he better not fucking go near him or my sister or he’d find out. AITA?