“Hey, what’s in this drink?” is, I think, a bit of a giveaway.
Nah, sounds like she’s saying starting to relent to the flirting (she is flirting too) by saying, “hey, what’s in this drink?” knowing her inhibitions are loosening.
Take it in context. It’s typical boy/girl stuff.
Once in college I met a girl and that night we were really getting along (wink, wink) but she pulled the “not of the first date” thing. So I drove her back to her dorm, went home, called her back and asked for a second date that night.
Third date was breakfast. Was I being too aggressive? lol
No. It is a cultural expression of the era: I am not acting like myself, so I want to blame something for it.