I Flop a straight on montone board. River decision? (200NL 6max)

[I_Like_Beer]

Villain is a total unknown. I have no datamined stats on him, so he is not a regular. This is only the 3rd hand at the table.


Full Tilt Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $193.65
BB: $59.00
UTG: $231.05
CO: $232.00
Hero (BTN): $200.00

Preflop: Hero is dealt J[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (5 Players)
UTG calls $2.00, CO folds, <font color="red">Hero raises to $9.00</font>, 2 folds, UTG calls $7.00

Flop: ($21) A[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $12.00</font>, UTG calls $12.00

Turn: ($45) 8[img]/images/graemlins/club.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $30.00</font>, UTG calls $30.00

River: ($105) 7[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">UTG bets $116.00</font>, Hero ??????


Do I call this? He could have the flush obviously, but he could also have a busted draw (High heart plus a pair maybe?), two pair, etc...