Betting capped on all streets, what to do at the river?

[SoCalRugger]

MP1 is 64/5/.25 (63 hands) VPIP/PFR/AF
Button is 92/20/.44 (25 hands)

Party Poker 2/4 Hold'em (9 handed) converter

Preflop: Hero is BB with T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls, <font color="#666666">2 folds</font>, <font color="#CC3333">Button raises</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero 3-bets</font>, MP1 calls, <font color="#CC3333">Button caps</font>, Hero calls, MP1 calls.

Flop: (12.50 SB) T[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, MP1 calls, <font color="#CC3333">Button raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP1 caps</font>, Button calls, Hero calls.

Turn: (12.25 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP1 raises</font>, Button calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP1 caps</font>, Button calls, Hero calls.

River: (24.25 BB) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP1 raises</font>, Button calls, Hero calls.

Final Pot: 30.25 BB

River card is kind of scary, especially since it was not uncommon for people to cap the betting while still on draws. Am I right to put the brakes on when it hits? Or do I need to man up and keep on raising, and if I get rivered (or outdrawn on the turn, for that matter), then it sucks to be me...

Results will be posted tomorrow.