What do I do on this river?

[Baseballer02]

I really didn't want this river to get checked through, or did I?

PokerStars Pot-Limit Omaha/8, $1.00 BB (8 handed) converter

MP1 ($82.80)
MP2 ($24.80)
CO ($41.85)
Button ($57.65)
SB ($37.10)
BB ($52.10)
UTG ($20.05)
Hero ($143.60)

Preflop: Hero is UTG+1 with 8[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img].
UTG calls $1, Hero calls $1, <font color="#CC3333">MP1 raises to $2</font>, <font color="#666666">2 folds</font>, Button calls $2, <font color="#666666">2 folds</font>, UTG calls $1, Hero calls $1.

Flop: ($9.50) A[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
UTG checks, Hero checks, <font color="#CC3333">MP1 bets $5</font>, Button calls $5, UTG folds, Hero calls $5.

Turn: ($24.50) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP1 checks, <font color="#CC3333">Button bets $4</font>, Hero calls $4, MP1 folds.

River: ($32.50) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $30.95</font>, <font color="#CC3333">Button raises to $46.65</font>, Hero calls $15.70.

Final Pot: $125.80