I got a few asks about Bonnie (Lexi's mother), so I wanted to post a small debrief on her before I respond to those (as including this in those posts would make them way too long)
The divorce wasn't Bonnie's fault, as she never actually cheated on Teddy, and throughout Lexi's origin story, I try to make it clear that she's just trying to make the best out of a bad situation. When Teddy left, she assumed she must have done something that led Randy on, so she blamed herself and didn't feel like she had any right to ask Teddy for financial support. But without it, she would lose everything, and most importantly, Lexi. So she married the only person who would do so on such short notice, Randy. Someone she had absolutely no love for, even resented, yet she had to pretend for the sake of her daughter. So Bonnie was a mother, a wife, a divorcee, then a wife again, all before the age of 24.
When you sacrifice that much of yourself for someone, it makes you possessive.
To Bonnie, her life is wilted and empty. She's poor, in debt, working a shitty job, married to a creepy man-child whom she hates, and has lost the love of her life. And she blames herself for all of it. The only good thing she has, the thing she lives for, is Lexi. To live such a destroyed, sad life, and then have to watch her child's mind eat away at itself, all while she claws to hold it together, made Bonnie desperate and tunnel-sighted. This was only worsened after Lexi almost died and spiralled further, and then seemingly went insane (which was actually The Wrangled's influence). Bonnie was forced to see the only good thing she had, her own daughter, slowly spiral into insanity, and there was nothing she could do.
Bonnie was so, so desperate to keep Lexi safe that in her desperation, she completely missed the abuse that was happening under her nose. Any tension in the house she assumed was caused by Lexi's unpredictable behaviour, and any bruising or markings she assumed was self-harm. It certainly didn't help that Randy fed into Bonnie's guilt and self-doubt to manipulate her into thinking she was reading into it, if she ever did express concerns.
This desperation was also what made Bonnie force Lexi to come back to Washington. While Lexi seemed much happier and safe in Montana, seeing her have such a positive relationship with Teddy after years of hating him made Bonnie insecure. As I said, Lexi was the only good thing Bonnie had, and Lexi relying on her made her feel some peace, so thinking that Lexi no longer needed her made her panic. Which is also why her relationship with Lexi deteriorates so quickly at the end. Throughout Lexi's troubled life, her mother was always her rock. They never argued. So when Bonnie became the target of Lexi's resentment, she had no idea what to do and kept making the wrong decisions as she tried to fix it.
In summary, I think we can all agree that Bonnie was not the greatest mother. She was self-sacrificing and unconditionally loving, and absolutely deserved better than what she got, but that doesn't excuse her actions. As if Bonnie had swallowed her guilt and called Teddy, she would have never married Randall, and Lexi would have never been attacked. More importantly, if Bonnie hadn't brought Lexi back to Washington, Lexi would have never become a proxy. In a way, Bonnie's desperation to keep her daughter safe was what doomed her.