If a girl is being really flirty/sending nudes on Snapchat/etc. But then turns around and says "but we're not having sex when we hang out", is this a shit test? Or is she being serious? I can't decide.

Btw: this situation hasn't happened yet, but I anticipate it with a girl I'm talking to.

What do I say if:

She asks "Are you expecting sex"

She says "We're not having sex"

Etc...