No reads on villian, I've just sat down on the table.

GAME #616854229: Texas Hold'em NL $0.25/$0.50 2007-08-03 14:37:22
Table Barium
Seat 1: Hero ($47.70 in chips) DEALER
Seat 3: dyonisien ($28.15 in chips)
Seat 6: Paxy17 ($63.00 in chips)
Seat 8: Hermaion ($49.50 in chips)
Seat 10: Villain ($50.00 in chips)
Paxy17: Post SB $0.25
Hermaion: Post BB $0.50
*** HOLE CARDS ***
Dealt to Hero [Kc Kd]
dyonisien: Sitout
Villain: Raise $2.00
Hero: Call $2.00
Paxy17: Fold
Hermaion: Fold
*** FLOP *** [6c Qs 2d]
Villain: Bet $3.75
Hero: Call $3.75
*** TURN *** [6d]
Villain: Check
Hero: Bet $7.50
Villain: Call $7.50
*** RIVER *** [Jc]
Villain: Check
Hero: Bet $15.00
Villain: Raise $36.75
Hero: ???

Yeah, I know re-raise pf, but I fancied mixing it up a bit. What now though?