Have namechanged for this
I've got my 17 yo brother staying for the weekend. This morning him and dh swapped places in bed whilst I was still asleep. When I woke up and I was still in half asleep phase I snuggled up to who I thought was DP etc. Only for my brother to say I love you sis but incest is a bit far, cue hilarious laughter from him and dh who was in the room. AIBU to not get why this was funny in any way