I dunno why Frank thinks talking to Nessa will magically give him a way to avoid Abby; Nessa's been very up front that she cannot give him answers, just listen to him and while he thinks various options out and give an opinion, and she's done that already. She told him he either lets Abby go, almost literally I imagine by moving into his own place and reducing contact and time around Abby--which Frank will never ever do because he loves her and is terrified by the idea of losing her--or to give Abby what she wants and be romantically involved with the caveat that they would likely need to cut ties with anyone that knows them (of course this was before she learned of Frank's harem) and move to a place no one knows them. I say they build a compound on the land their inherited cabin is at and have the whole extended family hole up there. But that might be biting off what I see for the future of Grandma's House with his property that will likely be a small town that includes Thomas' own cult that worships his penis, but not Thomas himself. I appreciate that distinction. Frank wishes he had that confidence.
I also liked Frank's exchange with Tanya in the shower and him being weirded out that she and Ashton were nude around each other, because Frank then had the thought of being nude around his sister and he wasn't grossed out, more of a "I got enough to worry about without adding to it."