I might be putting on my tinfoil hat here, but it's possible that the sudden "I'm uncomfortable with lewd asks, I only let close friends do that to me" could be a preventive way to contradict the narrative of Lizzy and her story about how she made an entire thing to have strangers tell her what they would do to her on a sexual context? She talks about being uncomfortable as if always have been a thing and, in fact, as if it was against her very own nature to be into that kind of thing.
Lizzy did say Liliana considered that "the worst thing I have ever done", so while she's pushing the narrative that Lizzy raped her she's also rebranding herself as the type of person who would never pull something like that on their partner. That way her fans have something to argue with if they want to go defend Liliana's honour when people bring up the accusations. "How could she have done that if she's demiromantic and uncomfortable with that on her blog to this very day?" It could be Liliana also catch on how weird does it look for a supposed victim of multiple rapes to be so willing to have people talk about all the ways that could humillitate her and use her sexually?
Or maybe I'm seeing too much into it and she means a very specific kind of "intimate" messages that she'll never clarify enough for her audience, just so she has an excuse to portray herself as the victim being "harassed" by all these people who can't respect the boundaries she fails to establish clearly. There's some intention behind this sudden turn around, it's just a game to figure out which one.
