Bothersome Spot in FTP 75 Doublestack

[Mench]

Blinds 80-160
My stack is around 2700

Folded to HERO in CO with AdKs, who raises to 480

Villain in SB, who is unknown after 30 hands but semi nittish


Min 3 bets
Shoves
3 bets to 1200

Villain has 5500, BB has Villain covered, and BB folds.



Not that I don't think this is standard, but I think villain 3 betting with BB yet to act makes it a bit more interesting.