[ihardlyknowher]

I would raise this PF 3 off the Button every time.

I would just call the flop, because the value gained is pretty thin and checking the turn gives your hand anyway - which I would do with 2 players still in on the turn.

I think villains turn raise is either 2-pair (involving a 3), a set, or a complete bluff. Since we only beat a complete bluff. I would check-call the river, to let him bluff once again.