KK - Ace on the flop. Common situation, I need to fix it

[pergesu]

Second hand of the tourney.


Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed) FTR converter on zerodivide.cx

UTG+1 (t800)
UTG+2 (t800)
MP1 (t800)
MP2 (t800)
MP3 (t670)
CO (t770)
Button (t975)
SB (t785)
Hero (t800)
UTG (t800)

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">4 folds</font>, MP2 calls t15, <font color="#666666">2 folds</font>, Button calls t15, SB completes, <font color="#CC3333">Hero raises to t75</font>, MP2 calls t60, Button folds, SB folds.

Flop: (t177.50) Q[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets t125</font>, Hero folds.

Final Pot: t302.50


This kinda thing happens a billion times a day, and I'm not sure what to do. Betting imo is -EV because I only get called/raised by an ace. Checking, on the other hand, just says "Yo dude, take it, I'm a pussy."