Live 200NL - 88, donked into on the Q turn

[KurtSF]

It was about 3am and this was a great game. Lots of chatter about banging chicks, sports, and even prop betting and side bets going on. If anyone is paying attention, which I'm pretty sure they are not, I'm a nit.

I get 88 on the button and raise to $20. I'm called in 2 places. In MP by probably the best player in this game, and in CO by the worst.

MP showed up about an hour ago and is playing a tight aggressive game. Hasn't said a word to the table. I don't think anyone else has noticed him but I'm pretty sure he's the ringer here. I've played one hand since he's sat down, raising to $20 in MP then c/fing the flop 4-ways when AK whiffed.

CO has been there longer than me and is just a POW. Very loose, can make big bets, but doesn't like folding. There's a reason he's on my immediate right.

Effective stacks are about $400.

Flop comes T56, two spades. I don't have a spade. $60 pot.

Action checks to me and I bet $40. MP calls, CO folds (damn).

Pot is $140 and the turn comes a red queen. MP leads for $80.

Auto-fold? It really felt like I was facing a big hand, maybe AQ, KQ, 55, or 66. But I was a bit thrown off because this is the one player at the table who could pull off a float. Is there any reason to take a stand here, playing a tricky player when you're image is weak? I know its player dependent, but how often is this a move?