Was V really stupid enough to think Frank's dad was wanting her to have sex with his kid?

In the scene where he's hooking up the cables to charge her battery he's going on about Frank needing her help and he wants him to get the experience etc, in V's mind she thinks he's talking about sex, but Frank's dad is talking about math tutoring.

And its funny she doesn't seem to be shocked by the thought of him wanting her a grown woman to have sex with his 13 year old son, instead shes kinda going along with it and goes "I'd rather help you". I dunno that scene just seemed dumb to me, as if she thinks a dad would be fine with having a 30 year old hooker having sex with his 13 year old son.

But what makes it worse than her being dumb is she seems fine with having sex with someone who would have a grown woman illegally have sex with his small child.