(22) Monsters under the bed?

[golfcchs]

Party Poker No-Limit Hold'em Tourney, Big Blind is t300 (5 handed) FTR converter on zerodivide.cx

UTG (t1425)
MP (t1130)
Button (t1960)
SB (t540)
Hero (t2945)

Preflop: Hero is BB with T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG calls t300, <font color="#666666">3 folds</font>, Hero checks.

Flop: (t750) 3[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>

Hero?

UTG has been pretty tight especially on the buble. This reaks of slowplaying a big pair. I know if he is slowplaying it is most likely aces, but I have seen this be QQ, or JJ plenty of times from player that I thought were better. So Do you think I can push, or do I have to check fold to what is most likely slowplayed aces?