99 versus mega-fish

[dfscott]

Early in a 10-person, single table, home tourney. Everyone is still at roughly 1000 chips, blinds are 20/40 (2nd level).

I'm on the button with 99.

4 limpers to me, I raise to t160, BB calls and one MP limper calls.

Now, the two people that remained in the pot are mega-fish. That is, they will call down with anything and bet any pair, but hardly ever raise (BB had been last to act on the river in an earlier hand and had checked the nut flush) and never, ever fold.

Flop (t580): J34 rainbow

MP bets 50, I call, BB calls.

Turn (t730): 7 (two of a suit, but I have none of that suit)

MP bets 50, I call, BB calls.

River (t880): 3 (no flush possibility)

MP checks, I check, BB checks.

I was totally lost here -- I felt like pushing a lot of money in could win me a lot but it could also lose me a lot. Does anyone fold this on the flop or take a stab somewhere along the way? I would normally fold this pre-flop, but there were a ton of unraised family pots to this point. With more experienced opponents, I would probably raise the flop to see how they react, but I know these guys are calling with whatever they have.