TPTK with another pair on board

UTG is semi-loose-passive/passive

I just couldn't see throwing away top pair top kicker. The guy bets, but does that mean he has the 10 or that he has Krag?

Party Poker No-Limit Hold'em, $ BB (9 handed) FTR converter on zerodivide.cx

MP2 ($17.30)
Hero ($18.60)
CO ($11.55)
Button ($19.48)
SB ($20.25)
BB ($21.10)
UTG ($23.42)
UTG+1 ($4.41)
MP1 ($67.90)

Preflop: Hero is MP3 with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $0.10.
UTG calls $0.25, UTG+1 calls $0.25, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $1.5</font>, <font color="#666666">2 folds</font>, SB (poster) calls $1.40, <font color="#666666">1 fold</font>, UTG calls $1.25, UTG+1 folds.

Flop: ($5) T[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">UTG bets $2</font>, Hero calls $2, SB calls $2.

Turn: ($11) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">UTG bets $3</font>, Hero calls $3, SB folds.

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

Final Pot: $23

[pokahjokah]

I would raise that flop to $4.50, then lead the turn for $5 if checked to. I would fold to reraises in either case, and if he called me down, then I would probably check behind on the riv.