LOTS of action - do I slow down with my set?

[Fat_Cat]

Party Poker 1/2 Hold'em (10 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is MP1 with 9/images/graemlins/diamond.gif, 9/images/graemlins/spade.gif.
UTG calls, <font color="#CC3333">Maniac raises</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">1 fold</font>, MP3 calls, <font color="#666666">3 folds</font>, BB calls, UTG calls, Maniac calls.

Flop: (15.50 SB) 9/images/graemlins/club.gif, A/images/graemlins/diamond.gif, T/images/graemlins/spade.gif <font color="#0000FF">(5 players)</font>
<font color="#CC3333">BB bets</font>, UTG folds, Maniac calls, <font color="#CC3333">Hero raises</font>, MP3 calls, <font color="#CC3333">BB 3-bets</font>, Maniac calls, <font color="#CC3333">Hero caps</font>, MP3 calls, BB calls, Maniac calls.
Great, I hit my set and I'm getting action. Ok, the action is coming from the fishy BB, but I'm thinking he's holding AT or (worst case scen.) TT. Hope it's not TT.

Turn: (15.75 BB) 4/images/graemlins/diamond.gif <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Maniac raises</font>, <font color="#CC3333">Hero 3-bets</font>, MP3 folds, <font color="#CC3333">BB caps</font>, Maniac calls, Hero calls.
Maniac does what he always does... I'm not worried. It's when BB caps that I'm thinking I made a mistake by raising. Did I?

River: (27.75 BB) K/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Maniac raises</font>, Hero calls, BB calls.

Final Pot: 33.75 BB

[Fat_Cat]

Oh, and I should mention that maniac had been raising pretty much every hand since I sat down at the table. Hence the 99 3-bet.

[dinero2433]

Whew! I can see why you're scared. TT and a backdoor flush are uncomfortably possible, but plenty of overplayed two pair hands are possible, too. Call it down after the turn cap.

[jar]

I agree, call down after the turn cap. That river card really sucks. This is a call and kick the dog situation I think.