Heads up flopped set with flush on board

[aggie]

I'm watching tv so i'm not paying much attention. I do know villian has been involved a lot of pots but i'm not sure how aggressive he is. I just doubled up through him when i turned the nut str8 and he turned the 2nd nuts...

PokerStars No-Limit Hold'em, $2 BB (5 handed) FTR converter on zerodivide.cx

saw flop|saw showdown

Hero ($408.60)
Button ($392.15)
SB ($360.30)
BB ($65.10)
UTG ($72.30)

Preflop: Hero is MP with 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img].
1 fold, Hero raises to $6,1 fold, SB calls $5, 1 fold</font>.

Flop: ($14) 7[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img] (2 players)
SB checks, Hero bets $10, SB calls $10.

Turn: ($34) 6[img]/images/graemlins/heart.gif[/img] (2 players)
SB checks, Hero bets $40, SB raises to $80</font>, Hero calls $40.

River: ($194) 8[img]/images/graemlins/diamond.gif[/img](2 players)
SB bets $264.3 (All-In)

What now? Comments on all streets welcome...