flirtively

Adj. The act of being flirty with someone, specifically when trying to cleverly get your flirt on.

Girl: "I really want world peace!!"

Boy: "Ahhh, that's new...and very original...I don't think I've ever heard of anybody else wanting that."

Girl: "Ohh shut up...now you're just mocking me!!"

Boy: "I'm not mocking you, I'm flirtively teasing you :)"