NL 25

Apologies I couldn't get the hand history converter to work on this Full Tilt hand. No strong reads on villain, doesn''t seem like a fish though.

UTG calls
Hero(CO) [Ah Ad] raises to 3BB
Button calls
UTG calls
Pot 10.5BB

Flop 6s 5d 6h
UTG checks, Hero bets 4BB, Button + UTG call
Turn 3h (Pot 22.5BB)
UTG checks, Hero bets 12BB, B raises to 32BB, UTG folds, Hero calls.
River Kc (86.5BB)
Hero checks button bets 90BB

Hero?

Will post my reasoning afterwards if I get some feedback so as not to bias your thoughts