What intrigues me, It's been over a year now on various topics on this subject and Larian hasn't done anything about it all. Whether this was intentional or not, it managed to destroy the Shadowheart romance for me.
Well, if this was intentional, all that's left is disappointment.
At this point I do think Seho's right that it's intentional. The lack of poly flags on the banter in question, the disapproval if you turn away Halsin at the brothel, the other questionable lines with no poly flags, everything. Comes across as them trolling for the giggles. Tbh the whole brothel seems like troll content. The player pressures Gale into something he doesn't want to do and Astarion disassociates at the end of his scene. Very very "fun" guys
Even if it's likely on purpose I'm still gonna keep complaining though. Love this game but damn this sucks
Edit: Oops didn't see the mod's comment before mine. My bad