Stop stopping and going - set on flush board

[milesdyson]

No reads, I haven't played pizoker in a while and some of these guys are new. Mainly looking for thoughts on the flop and river.

Paradise Poker 0.50/1 Hold'em (9 handed) converter

Preflop: Hero is CO with 3[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls, MP3 calls, Hero calls, <font color="#666666">1 fold</font>, SB completes, BB checks.

Flop: (5 SB) 3[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">SB bets</font>, BB folds, <font color="#CC3333">MP2 raises</font>, MP3 folds, Hero calls, SB calls.

<font color="blue">I usually 3-bet here. I'm not positive why I didn't.</font>

Turn: (5.50 BB) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">MP2 bets</font>, <font color="#CC3333">Hero raises</font>, SB folds, MP2 calls.

<font color="blue">MP2 just calls - I feel it's pretty obvious he does not possess the wild flush.</font>

River: (9.50 BB) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets</font>, <font color="#CC3333">Hero value raises ...</font>

<font color="blue">Now since he didn't 3-bet the turn, I value raise the river. I'd like to say I could fold to a 3-bet (because he's not 3-betting me with T9 or AT), but I highly doubt him having the flush based on the turn action.</font>