9 players, 1 am Montreal Casino, just got there 2 hands ago.

Villain UTG bluffed on the river 2 hands ago. 3 MP just came back from cigarette break they all posted BB. $1/$2 every one deep stack the players in the hand has $225-250.

UTG raise $12, I feel he might be playing because of the extra $6 in the pot.
MP calls
Button hero Ad2d calls.

$43 in the pot

Flop 8c Ah 8s

Check, check, hero bets $25

UTG calls, MP folds.

Turn 5d

Check, check

River Qd

UTG raise $50.

What would you do? Did you play differently the hand before, 3 bet? fold? turn?

Thank you,