Flopped Trips, Good Kicker but lots of aggression

[_Kevin_]

Both villians are quite loose & passive preflop and moderately aggressive post flop (this is based on 20-30 hands so the read is some what questionable). I feel like I really played this hand poorly but I'm not sure how else I should have played it. Comments on all streets please.

Party Poker 1/2 Hold'em (6 max, 5 handed) converter

Preflop: Hero is BB with 3[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, MP calls, Button calls, SB completes, Hero checks.

Flop: (4 SB) 3[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, <font color="#CC3333">MP raises</font>, Button folds, SB calls, Hero calls.

Turn: (5 BB) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, <font color="#CC3333">MP raises</font>, SB calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP caps</font>, SB calls, Hero calls.

River: (17 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, Hero checks, <font color="#CC3333">MP bets</font>, SB calls, Hero calls.

Final Pot: 20 BB