Or maybe she just was not in the mood for a one-night stand? Perhaps she wanted a candelit dinner at a restaurant with at least 2 stars first.
She has ambient diologue with Astarion where she says she perfers one night stands, but that was probably the brainwashing talking
I am aware. Think she has a similar line with Gale.
Though I do find it interesting that she turns down wyl’s flirtations on the ground she does not want to play second fiddle to the others he flirted with.