I really like this post, I don't think Alice believes they are equally complicit, as she sees Ioan leaving as being the locus for her undoing. If he had only stayed and kept the status quo, no matter how much of a fiction it was, none of this would have happened. She thinks this is all on him.
Her obsession with Bianca is fascinating to me. She has created in her mind, and put on SM, an entirely imagined accounting of that relationship, assigning motives, actions, and outcomes. These are either based on the thinnest evidence, or Alice's outright lies. Nothing she reports is any way based in reality, as she has never let truth stand in the way of making a slander. Her accusations change with the wind, or her alcohol/ambien intake. I don't think she really believes Bianca is somehow the mastermind running a shadow campaign against her, but saying it makes her a fair target for her ire. Nothing is off the table, and she is framed as having no redeeming qualities. She is sexually promiscuous, a home wrecker, a liar, and ugly to boot. There is no objective evidence for any of this. Outside of Alice's circle of haters, Bianca comes across as resilient, spiritual and optimistic. She seems to have made friends, and found her place here, despite the constant character assassination. I'm sure it makes Alice absolutely nuts to see Bianca's social circle expanding as her own shrinks.
Alice truly needs Bianca at this point to keep control of the entire situation. She has demonized Bianca to her daughters as being the reason their parents aren't together, and made it obvious seeing her would be a betrayal to their mother. She has convinced her followers, who don't seem to share a critical brain cell between the lot of them, that's Bianca's a slut who wronged Alice, and destroyed her perfect marriage. She has attempted to split Ioan and Bianca as a couple, and she sees it as justified revenge on her ex.
Sadly, she seems to forget that between the two of them, she is the one with a long and documented history of internet trolling and abuse. She really doesn't seem to understand that SM isn't a courtroom, and her machinations will be very transparent once she's in one. I'll be very curious to see how it all plays out...