Baby flush with 200 BB stacks.

[pzhon]

I'm worried that I might have misplayed the river of this hand.

Online NL, 10-handed. <font color="white">843769651</font>

Hero (Button) has 392 BB.
MP1 has 269 BB. No reads.
Villain (MP2, PFR) has 199 BB. Villain was also playing at another table with the hero (and winning at both tables). From the response time at the other table, it appeared that he was paying attention to the current hand. Earlier, at the other table, he had twice made 1/2-2/3 pot continuation bets, then folded quickly to flop check-raises by the hero. He may feel I have been pushing him around.

The blinds were short-stacked, with 20-45 BB. All other players had 20-95 BB.

Hero is dealt 8[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/spade.gif[/img].

Preflop:
One fold. UTG+1 limps. MP1 limps. Villain raises to 4 BB. Three folds. Hero calls 4 BB. The blinds fold. UTG+1 calls 3 BB. MP1 calls 3 BB.

Flop (4 players, 17.5 BB): 5[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img]
Two checks. Villain bets 5 BB. Hero calls. UTG+1 folds. MP1 calls.

Turn (3 players, 32.5 BB): Q[img]/images/graemlins/club.gif[/img]
Three checks.

River (3 players, 32.5 BB): J[img]/images/graemlins/spade.gif[/img]
MP1 checks. Villain bets 4 BB. Hero...?

I'm almost 100% sure the Villain has something, but it could be anything from second pair to the nut flush. I have no idea what MP1 has. I'd like to win the most if I am ahead, and lose the least if I am behind. What is the right line on the river?