FPS or appropriate flop smoothcall?

[einbert]

Note that MP2 is all-in after the flop action, making the pot effectively heads up. Based on the SB's VPIP (fairly tight at ~20) and PFR of ~5, I figured that I was either way ahead or way behind on the flop. I thusly took the "WA or WB" line planning to use my positional advantage to put one bet in on each street. I also felt that just calling the flop would make SB more likely to be suspicious and call down with maybe KK. I also wasn't worried about any 8- or 9-outers on the flop due to its texture. Was my play appropriate, or should I have gone ahead and raised this flop?

Party Poker 1/2 Hold'em (9 handed) converter

Preflop: Hero is MP3 with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises</font>, <font color="#666666">1 fold</font>, MP2 calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">SB caps</font>, <font color="#666666">1 fold</font>, UTG+1 calls, MP2 calls, Hero calls.

Flop: (17 SB) Q[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, MP2 bets, Hero calls, SB calls.

Turn: (9.50 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

River: (11.50 BB) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

Final Pot: 13.50 BB