265bb deep 50/100 hu hand

[Terkman]

Was stuck some against this guy when this hand popped up. He has been running v hot, flopping flush vs flush ect... I am not sure what his range for valuebetting this river is. Think he pretty much always 3bets big pairs preflop. If this is 4ofakind or bluff then I guess I have to call because 4ofakind is pretty damn hard to get. Although there aren't many hands he could be bluffing with... Thoughts on turn play also appreciated.

BennyBula sitting in seat 1 with $32185.40 [Dealer]
- Terken89 sitting in seat 2 with $26508.46

BennyBula posted the small blind - $50.00
Terken89 posted the big blind - $100.00
** Dealing card to Terken89: 9 of Diamonds, 8 of Hearts
BennyBula raised - $350.00
Terken89 called - $350.00

** Dealing the flop: 6 of Hearts, 7 of Diamonds, 5 of Spades
Terken89 bet - $700.00
BennyBula called - $700.00

** Dealing the turn: 7 of Spades
Terken89 checked
BennyBula bet - $2092.65
Terken89 raised - $8377.95
BennyBula called - $8377.95

** Dealing the river: 7 of Clubs
Terken89 checked
BennyBula bet - $18440.63