A3s flop A in EP against tighties

[MrEngenic]

Focus on postflop. Button has preflop raise 7 over thousands of hands. UTG is also tight but more aggressive.

Preflop:Hero is MP1 with A [img]/images/graemlins/heart.gif[/img]3 [img]/images/graemlins/heart.gif[/img]
UTG limps, Hero limps, Button raises, blinds fold, UTG calls, Hero calls

Flop: (7.5 SB) A [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/club.gif[/img] (3 players)
UTG checks, Hero bets intending to fold to a raise, call down a turn raise if it's HU.

Anyone with a better line?