TP2K, pot control vs protection

[danny8]

Cryptologic - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $44.35
BB: $9.00
Hero (UTG): $50.00
MP: $57.15
CO: $49.25
BTN: $65.75

Reads: <font color="blue">MP is fairly tight, i cant see him cold 3betting the flop with anything less than a set. If he calls im fairly sure im beat.

SB seems pretty loose in the 15 or so hands ive been with him, limps a lot, calls raises, generally loose/passive</font>

Preflop: Hero is dealt J[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] (6 Players)
<font color="red">Hero raises to $2.00</font>, MP calls $2.00, 2 folds, SB calls $1.75, BB folds

Flop: ($6.50) 2[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/club.gif[/img] (3 Players)
<font color="red">SB bets $1.00</font>, <font color="red">Hero raises to $6.00</font>, MP folds, SB calls $5.00

Turn: ($18.50) 5[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $12.00</font>, SB calls $12.00

River: ($42.50) 4[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, Hero checks

is this ok to be playing KJ like this? i know im building quite alarge pot with a very marginal hand, but i dont wanna give freecards to draws.