$1000 eff. Nitty recreational player in BB. MP1 opens to $40, I call in CO with KhJd, BB calls.

Flop: KcQhJc Pot 125 Checks to me, I bet $80, BB CRs to $320, MP1 folds

Let's assume that BB is nitty and never raises draws and never raises anything less than 2-pair here. So then we beat QJ and lose to KQ/JJ/KK/QQ/AT. Provided our assumptions are correct can we just fold?