I don't know. Rachel's powers of denial are mighty. If she's been able to resist Ivy in black leather with her fangs glinting dangerously in the moonlight, I think Rachel could no-homo her way out of anything.

Mistress Ivy wouldn't take no for an answer! In fact, I'm 99% sure that the Hollows is all about a subconscious femslash dub-con kink. The last book in the series is going to be Ivy getting all up in that neck, Rachel going "Ivy, no... don't stop!"... then several chapters of awkward before Rachel admits she's gagging for it. "I came seven times and then begged for her to use a dildo on me, does that make me a lesbian?"