Top pair hits lots of action... River?

[PSW]

Party Poker 2/4 Hold'em (10 handed) converter

I was out of sorts with this hand. All comments welcome.

MP2 is a 34/22/3.2 after 49 hands.
SB is 78/2/0.2 after about 48 hands.

Preflop: Hero is CO with Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, MP1 calls, <font color="#CC3333">MP2 raises</font>, <font color="#666666">1 fold</font>, Hero calls, <font color="#666666">1 fold</font>, SB calls, BB calls, UTG+2 calls, MP1 calls.

Flop: (12 SB) Q[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, UTG+2 folds, MP1 folds, <font color="#CC3333">MP2 raises</font>, <font color="#CC3333">Hero 3-bets</font>, SB calls, BB calls, MP2 calls.

Turn: (12 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, MP2 calls, Hero calls.

River: (16 BB) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, BB folds, <font color="#CC3333">MP2 raises</font>, Hero ???