$11s Got a pair, but is villain slow playing some big hand here?

[Hand_Crasher]

Party Poker
No Limit Holdem Tournament
Blinds: t300/t600
4 players
Converter

Stack sizes:
UTG: t4080
Button: t8750
SB: t3410
Hero: t3760

Pre-flop: (4 players) Hero is BB with 3[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/spade.gif[/img]
UTG folds, Button calls t600 <font color="aaaaaa">(pot was t900)</font>, SB folds, Hero checks.

Flop: Q[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (t1500, 2 players)
<font color="#cc0000">Hero ????</font>.

Villain has never open limped button before, check/fold just because that or yell screw it and push?

[gcaash]

with those reads , i chek/fold here ..