She’s using past experiences where flirting led to sex as a guide.

I’d say either completely disregard the idea you just want to smash by making her understand there is no pressure at all to do anything your just tryna vibe with her.

Or take the risky approach and spin how she’s feeling afraid of being used because your flirting by saying something like “would you still feel that way if the last guy that flirted with you was still with you? Me flirting doesn’t mean a one night stand”