This is a test question you can flip to your own advantage.
First: realize you are not obligated---and SHOULD NOT--answer an intrusive and inappropiate question. And her lines of inquiry are certainly that.
You can play off it with a C&F style "that's classified information and you don't have security clearance yet.."
Or a straight up "that would be telling now, wouldn't it?"
Or, if she caught you like the proverbial deer in the headlights, you can just straight out say "I don't kiss and tell" and then shut up.
This will tell her that should she decide to spread legs for you, you will be discrete. That's how you can flip it to your advantage.
And if she gets inappropriate and really tries to manipulate it out of you---give off the impression that she's being low class and out of line and just say "that's inappropriate." Shut up and put some distance between you and her for a little while that night. If she can't pick up on boundaries--she is low--and you need to inforce boundaries here.
Think of nexting someone like this, the pvssy isn't worth it.