How bad did I play this?

[Mr. Mojo31]

Approximate stacks:

UG - $480 plus
Button - $260
Hero is in the Cutoff - $340

UG (Super post-flop LAG) limps
Hero has 4 [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/diamond.gif[/img] raises to $10
Button (tightest player at the table) raises to $20
Blinds fold, LAG calls.
Hero Calls.

$63 in pot

FLOP:
4 [img]/images/graemlins/heart.gif[/img]-7 [img]/images/graemlins/club.gif[/img]-5 [img]/images/graemlins/heart.gif[/img]

UG checks
Hero Checks
Button bets $30
UG Calls
Hero check raises to $130

My read is Button has K-K or A-A, and is capable of letting it go. UG is on a heart draw...

So how bad is this line?