Paired w/set possibility against

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Party Poker No-Limit Hold'em Tourney, Big Blind is t150 (4 handed) FTR converter on zerodivide.cx

BB (t625)
UTG (t1265)
Button (t4210)
Hero (t1900)

Preflop: Hero is SB with T[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, Button calls t150, <font color="#CC3333">Hero raises to t450</font>, <font color="#666666">1 fold</font>, Button calls t300.

Flop: (t1050) T[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>

I know scumbag is limping with anything here. I raise pre-flop to keep the shorty from getting a free look at the flop.

I know I have to either check or push this. I pushed, but I'm thinking this is probably a check. If he has a K, he might check as well or bet an amount that would give me enough info. I don't think I benefit much by betting, as my A protects me from an A helping him.

This is a check, right?