Party 3/6 6 max: K9s on the button

[zram21]

The CO in this hand seems to have a decent starting hand selection, but in 200 hands has never raised preflop (27/0). He also seems to be fairly passive postflop. The SB is your typical loose passive both pre and post flop.

Party 3/6 6max: 6 handed

Preflop: Hero is the button with K [img]/images/graemlins/spade.gif[/img], 9 [img]/images/graemlins/spade.gif[/img]
2 folds, CO limps, Hero raises, SB calls, BB folds, CO calls.

Flop: (7 sb) Q [img]/images/graemlins/heart.gif[/img], 9 [img]/images/graemlins/club.gif[/img], 9 [img]/images/graemlins/heart.gif[/img] (3 players)
SB checks, CO checks, Hero bets, SB calls, CO calls.

Turn: (5 BB) 8 [img]/images/graemlins/spade.gif[/img] (3 players)
SB checks, CO bets, Hero raises, SB folds, CO calls.

River: (9 BB) 2 [img]/images/graemlins/diamond.gif[/img] (2 players)
CO bets, Hero raises, CO re-raises, Hero calls.

Final Pot: 15 BB

Comments on all streets are appreciated, but I am obviously wondering about my river play here. Just call the second donk bet? Cap the river?