To my parents' distress, my sister and I always hated each other. Well, not hated, actually, but we never got along, and up to my 14's (and her 12's) we'd get physical in our fights. My mother says she really thought we'd end up killing one another.
One day, when I was 16, I went to this friend's party. I got so drunk I don't remember how I got back home. And I really don't remember what happened next, this is all my sister's "version" of the story.
She was still up, watching something on her computer. I entered her room and looked straight to her face. She got mad I didn't knock so she pushed me. Drunk as I was, I just fell like a sack of potatoes. She then started to shove me off her room with her feet, since I was down. I grabbed one of her foot and pushed hard, so she fell. I crawled upon her and told her "bitch, you'll pay for pushing me". Then I grabbed her by her hair, threw her in the bed and ripped her pajamas. Then I undressed myself, jumped over her and fucked her. She says I hit her hard during this, slapped her across the face a lot. She likes to add that "it didn't last more than 5 minutes, though".
As I said, I don't remember this. And I don't know if I quite believe it. I have asked her "why didn't you scream or something", and she says she didn't "want to get me into trouble". This is unlikely, she would exaggerate anything I did so my parents would be mad at me all the time. And also I'm very skinny and since I was really, really drunk, she could have overpowered me easily that night, though she isn't a big girl.
Since that day, though, she's been a lot more "docile" to me. We don't fight anymore, and even when she gets mad at me, she likes to "talk things over". I do think this change is for the best, but I'm really over the fence as to why she changed so much.