99 value bet river?

[ESKiMO-SiCKNE5S]

4 handed, Pokerroom network 5/10

Button is an absolutely terrible superloosepassive preflop, super weak/tight/passive postflop player. complete donator.

SB is a pretty bad passive player; no specific postflop reads tho.

My own table image is probably pretty tight aggressive, havent really been too overly lag without the goods; am on a heater on this table.

Hand:

Hero has 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img] in BB
Button limps (standard), SB completes, Hero raises, Button calls, SB calls.

Flop: A[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/diamond.gif[/img]

SB checks, Hero bets, Button folds, SB calls

Turn: 6[img]/images/graemlins/club.gif[/img]

SB checks, Hero bets, SB calls

River: Q[img]/images/graemlins/spade.gif[/img]

SB checks, Hero ?