Botched river?

[haakee]

Full game, live 80-160. Over-aggressive, somewhat loose, tough, tricky, but winning pro limps UTG. 2 bad players limp, and I limp on the button with 9 [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/spade.gif[/img]. Both blinds come in.

Flop: T [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/heart.gif[/img] 4 [img]/images/graemlins/spade.gif[/img]. UTG bets out, two callers, I raise. Blinds fold. UTG 3-bets. 1 limper mucks, CO who is a terrible loose fish calls two cold. This could be a 4, a gutshot, or overcards, or something else weird. I cap it. Both call.

Turn: T [img]/images/graemlins/diamond.gif[/img]. UTG bets out. Fish folds. I call.

River: 7 [img]/images/graemlins/club.gif[/img]. UTG bets. I call? Who lays this down?