Aita?

My sister claimed, after I told my father his best friend sexually abused me, that he had abused her too. I had always showed an aversion to the friend. My sister, however, loved spending time with him. She would even say I'm making a big deal out of nothing when the BF would hang at our house visibly high or drunk. My father believed me bcs it was obvious something was going on with me, & BF admitted it, sighting drunkenness as his excuse. When sister made her claim, my father asked BF very pointedly, many times if he had abused sister. He adamantly said no every time. I'm older & was already developed at this time. Sister was a skinny tomboy. My sister always looked for attention, even being flirty with male relatives. Sister made life hell for dad & I after this. Yelling & being disrespectful. Always saying we were invalidating her, even though we knew she made it all up. Started throwing up after meals so she wouldn't get "fat like us". When that didn't work to get attention she became promiscuous & started drinking. Fast forward a few years, STILL turns the discussion back to the lie she told, insisting I believe her. Every time, trigging me abt the abuse I actually experienced. I stopped talking to her for the most part

Didn't hear from her either. Then one day, out of the blue, she sends me this long, nasty text abt how, bcs we both are older & have our own kids, I must see she's right. Really affected me mentally revisiting this traumatic time. She claimed she was drunk at the time & didn't realize she sent it. Yes she was probably drunk, she's ALWAYS drunk & making a scene, but I know damn well she knew what she did! One of my kids could have seen the message! I completely cut her off at this point, including her daughter who was rude & disrespectful whenever she visited. Like mother, like daughter. Our father is upset abt this & regularly tries to talk me into inviting them over & including them in my life. I've learned to set boundaries for my mental health & don't want her in my life. AITA?