She didn't mean "no idea Tai is a lesbian."
She might have.
Yeah, I'm pretty sure she did.
[/bovvered]She di'n't, tho.[bovvered]
Or more seriously, what Dora and Faye were saying "she has no idea" of was that Tai was counting this as a date, from cues obvious both to them and to the reader that Marigold, being Marigold, missed. The only way to read "she has no idea" as "she has no idea Tai's a lesbian," in conjunction with Dora's smile and Faye asking if they should have "warned" her, is if no lesbian would want to read another girl's fanfic without having designs on her, something I can't imagine Faye, and certainly not Dora, would believe. Marigold not realizing Tai to be a lesbian is neither a necessary nor a sufficient condition to Marigold not realizing how Tai initially saw their rendezvous, since whereas Marigold assuming Tai to be straight would be sufficient, the one doesn't necessarily imply the other, especially to someone as used to at least the idea of homosexuality as Marigold (both living in Northampton and immersed as she is in anime fandom) and someone as, well, "loud" as Tai; indeed, it would be more like someone sheltered in the way Marigold is to assume Tai to be a lesbian without further evidence. Likewise, Marigold, apparently unlike many on this thread, could believe that a lesbian reading her fanfic might not be trying to get into her pants, even if missing some rather obvious hints that this particular one is.
Frankly, I'm disturbed that two people in this thread have not only equated the two, but assumed Faye and, of all people,
Dora, who must have put up with the Carlin "imagine wanting to fuck everybody you meet" line of thought half her life, would as well.
...I think perhaps my syllable-to-word ratio suggests a degree of tipsy.