two pair river vs idiot

[rakes.a.beach]

Stack sizes:
UTG: $378
UTG+1: $138.80
Hero: $437.50
Button: $430.34
SB: $453.61
BB: $188.10

Pre-flop: (6 players) Hero is CO with T[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img]
UTG folds, UTG+1 calls, <font color="#cc0000">Hero raises to $10</font>, Button calls, SB calls, BB folds, UTG+1 calls.

Flop: T[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/heart.gif[/img] ($42, 4 players)
SB checks, UTG+1 checks, Hero checks, Button checks.

Turn: 3[img]/images/graemlins/club.gif[/img] ($42, 4 players)
<font color="#cc0000">SB bets $10</font>, UTG+1 calls, <font color="#cc0000">Hero raises to $45</font>, 2 folds, UTG+1 calls.

River: K[img]/images/graemlins/diamond.gif[/img] ($142, 2 players)
<font color="#cc0000">UTG+1 bets $78</font>, Hero ??


SB is a reg, who I don't think is too good. Button's another bag reg.

Villain is a huge donk, 44/18. He doubled off me qq vs ak a few hands ago.

he instabet the river if that matters.

On the turn, anyone just call?

edit: villain has six dollars behind