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The original was posted on /r/amitheasshole by /u/Haunting_Status_5194 on 2024-01-19 02:54:11+00:00.
My(24m) dad, step mom, step brother(25m) his girlfriend(25f) and step sister(19f) went on a trip. We booked 2 hotel rooms. My dad, step mom and step sister shared one and my step brother, his girlfriend and I shared one (there were 2 beds per room). When we got there, the three of us decided I would get the bed by the door and my step brother and his girlfriend would get the bed by the bathroom. All 6 of us were at the hotel bar (the legal age is 19 where we are) and I eventually decided to call it a night. My step brother was sloshed and my dad asked me to take him back to the room. I did and he pretty much layed on my bed and passed out. There were 2 beds, he was out like a light and I didn't feel like trying to wake him up so I just decided to use the other bed. I changed, crawled into bed then fell asleep.
I woke up to my step brother screaming and his girlfriend sitting on my bed. I asked what happened and my step brother kept screaming about his girlfriend cheating on him with me. His girlfriend tried explaining her side but he kept screaming over her. There were knocks at the door and my step brother let my dad and step mom in before calming down a bit. Apparently he woke up, saw his girlfriend and I in the same bed and thought we were cheating. His girlfriend explained that it was dark when she came in the room and she didn't want to turn on the light and disturb us so she went to the bed she thought he was in. I explained my side (he passed out on my bed so I just slept in the other) but he was still convinced she cheated with me. My step mom started to lay into me, apparently she thought I did it because I was shirtless. I always sleep shirtless and I said that but she again, didn't believe me.
Anyway, my step brother refused to be in the same room with either his girlfriend or I, so we ended up cutting the trip short. My step sisters blaming me for the trip ending so abruptly. She said I should have just woken him up. My step brother and step mom aren't talking to me. My dads trying to play peacekeeper.
AITA for not waking my step brother up?