KK vs possible quads, line?

[I R BABOON]

I've been pretty active last rounds catching some good cards and decided to slowplay this one.

Titan Limit Hold'em, $0.05/$0.10 (Titan HH Converter by Kreatief)

Button ($2.20)
SB ($2.06)
BB ($3.08)
MP3 ($1.72) (Hero)
CO ($1.96)

Preflop: Hero is MP3 with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img]
Hero calls, CO calls, Button calls, SB calls, BB checks,

Flop: 2[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img] ( 2.5BB )
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, CO calls, Button calls, <font color="#CC3333">SB raises</font>, <font color="#666666">1 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 folds</font>, Button calls, <font color="#CC3333">SB raises</font>, Hero calls, Button calls,

The SB seems like a solid player and I'm pretty sure he has 22 or JJ because he capped the betting in a 3way pot. The button plays any pair like the nuts so I'm not really worried about him.

Turn: 2[img]/images/graemlins/club.gif[/img] ( 9BB )
<font color="#CC3333">SB bets</font>, Hero calls, Button calls,

Ok this card hurts and I'm either far ahead to JJ or far behind to 22. I'm kinda scared so I just called the SB. Should I have raised or minimize the action?

River: 5[img]/images/graemlins/club.gif[/img] ( 12BB )
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#CC3333">SB raises</font>, Hero calls, Button calls,

Looking at it now I don't know why I raised the river when I was afraid on the turn the heat of the battle must have caused that [img]/images/graemlins/wink.gif[/img] When the SB re-raised me again I could almost see the quads through his cards but figured the pot was so big I couldn't fold.

So how was my play?