$1600 eff. My image TAG grinder. V is same. There is a $20 straddle UTG and two loose-passive donks call, I make it $90 with AhAc in MP2. V 3-bets to $300 in CO. Folds to me. I don't think V is capable of 3-betting light. I think his range is TT+/AQ+ and I think he'll fold a lot of it to a 4-bet so I decide to just flat.

Flop: KsJc6d Pot $675 I check, V bets $250.

Action's on us. What's our plan? What's the best line? Is folding still an option at any point in the hand and if so what circumstances would make us fold?