Flop top pair vs. 2 to flush

Limped preflop w/K[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/spade.gif[/img] Table is very passive with most players VP$IP at 40+ and PFR at 0.

PokerRoom 0.25/0.50 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: is with K[img]/images/graemlins/spade.gif[/img],10[img]/images/graemlins/spade.gif[/img] .
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">2 folds</font>, Fathomer1 calls, CO calls, <font color="#666666">1 fold</font>, SB completes, BB checks.

Flop: (5 SB) 7[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, UTG+1 calls, Fathomer1 calls, CO folds.

Top 2 pair. I don't raise since I won't chase anyone out. Flush draw will still be getting odds. I'm planning on raising the turn

Turn: (4.50 BB) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, BB calls, UTG+1 folds, Fathomer1 calls.

I see the seven as a scare card. I have no idea what SB or BB could have called/checked preflop, but since I have a King and a ten, that lead me to think that at least 1 made trips. Am I over rationalizing this?

River: (7.50 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">BB raises</font>, Fathomer1 folds, SB calls.

BB woke up on the river. The third [img]/images/graemlins/heart.gif[/img] made me think that atleast one made the flush. The pot isn't large enough to call for 2bb's, IMHO, plus if SB made a bigger flush I have to worry about a reraise.

tear it apart ladies and gentlemen.

Final Pot: 11.50 BB