Gale is a sleaze. If you get the weave scene, but do not spend the night with him at the party, he will ask to sleep with you the day after if you. He doesn't care if you "have" someone else.
Well in order for him to do that you must have flirted with him during the Weave scene. In the playthrough where I didn't trigger it, he totally friendzoned me. So I guess since he's getting mixed signals, he just checks where they stand. It's not exactly as if you're engaged after party "encounters": Shadowheart doesn't wanna see you again, Lae'Zal thanks you for exercise, Astarion never mentions it again (other than somewhat sarcastically calling the PC lover) and Wyll - that's just wrong (after that I'd bang a tree just to wash it off).
@Svalr: Damn you're good. No denying I did write that 😂
