AK in a straddled pot LIVE Deep Stacks

[JJBuffone]

Blinds are .25/.50 with a $1 live straddle. UTG+1 raises to 2.50 (very LAG tricky player who doesn't need to have a hand and most likely doesn't). Folds to me in middle position with A [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/diamond.gif[/img] and I raise to 7.50. Button cold calls (Loose calling station, effective stack is about 55 which I cover). His calling range is very large but I put him on a pocket pair (8s through Qs) or a big ace. Original raiser folds so 2 to the flop.

Flop 7 [img]/images/graemlins/club.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/diamond.gif[/img]
Pot (19.25)

I bet 15 and he thinks for about a minute and finally pushes for a little over 30. I call. Thoughts on how I played the hand??