5$ Top two turn brings flush

[phos4]

5$+50 on Ultimate no Hand History. Villain is passive,limped QQ OTB once (and ran in my twopair) and minbets alot draws but also monsters. However he doesn't seem like one of these uberdonks and doesn't go crazy with Top pair. I raised alot of his limps but he kept doing it.

Hero is SB with A8o. BB is 30
Hero raises to 90. Villain calls.

Flop is A[img]/images/graemlins/diamond.gif[/img]8[img]/images/graemlins/club.gif[/img]3[img]/images/graemlins/diamond.gif[/img] (Pot:180)
Villain checks, Hero bets 120, Villain calls.
Turn K[img]/images/graemlins/diamond.gif[/img] (Pot 420)
Villain checks, Hero bets 275, Villain raises to 680

~600 behind.
Anyone goes not broke here?