this play is a great example of why you push made hands hard against donks.
Saying that im not critical of the hand, only a fucking ejit calls that river with a flush.
Add to buddy list, carry on.
You'll make heaps off this guy fo sure

Lets be honest too, what does he think your three betting on the flop? Ace high?
Sod the odds and math, opps river call is downright horrible unless he was certain he had you beat and only H@l or a fish with 'TEH FLUSH' knows that through skill or stupidity.