There's a pretty well-known post written about her from the perspective of her short-time cousin discovering the girl he was close to as a child he fell out of touch with was a porn star while jacking off:
https://thehundreds.com/blogs/content/porncousin. It helps explain why she's so fucked in the head.
To summarize for those too lazy to actually read the whole thing: Lexi's biological mom died in a car accident (her biological father is never mentioned, I'm guessing he probably ran out or something) and she wound up being tossed around foster care families who only cared about the paycheck until being adopted by her new cousin's aunt and after a short while the aunt found herself unable to continue taking care of her while also dealing with cancer so Lexi wound up in the foster care system again.
Some choice quotes from the article:
"
I feverishly walked around my house like a mad man. I knew I’d eventually have to address the computer I just threw across the room, but for now I needed to assess the entire situation. What had once been a normal moment of looking at online porn had quickly become a life-changing moment. I was planning on masturbating, and then going on with my day, but when I realized one of the girls in the porn I was watching was my cousin, I screamed at the top of my lungs and couldn’t comprehend what to do next."
"
I’m progressive enough to understand that porn stars are normal human beings and making a conscious decision to partake in a profession I regularly enjoy, but all I could see was the 8-year-old child that meant so much to me."
"
It felt too weird to tell my mom her porn name, so I explained the entire situation to her, but left out that small detail. I wanted to remove her ability to Google and find a clip with James Deen thinking it was a tribute to the 1950s actor."