First of all, please comment earlier streets as well.
The river is the major thing i need help with but i got this "messed-up-feeling" OTT too.
And also , i had no intention of checkraising, i was checkcalling though.
I mean, if im betting , i cant get value from Ax-FDs, if he raises can i really call?
It felt like he had a set so often here, does he really raise with a good Q? I showed quite some strength imo. He could raise with an overpair but this was readless and i felt like he would 3bet exclusively PF.
So, is it okay to check back yall?

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 6 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

CO: $104.95
BTN: $56.00
Hero (SB): $51.75
BB: $50.00
UTG: $29.30
MP: $53.75

Pre Flop: ($0.75) Hero is SB with K 9
2 folds, CO raises to $1.75, 1 fold, Hero calls $1.50, BB calls $1.25

Flop: ($5.25) Q 6 5 (3 players)
Hero bets $3, BB calls $3, CO folds

Turn: ($11.25) 9 (2 players)
Hero bets $6, BB raises to $13.50, Hero calls $7.50

River: ($38.25) 9 (2 players)
Hero checks

i would fold preflop, and check the flop as getting raised would suck. as played you have to call the turn raise getting such good odds. check river and then evaluate based on his betsize.

as jacked up as this sounds I think river might be a c/f

If river had been a K you might be able to v-bet but the 9 kills all his 2-pair hands, although maybe he'd bluff 65 or Q6?

villain shows 78?

he would have raised flop with 66/55 there are so many draws out there (and one of them just made the turn so why would he minraise) i think when you donk the flop you rep 66/55 so the question is can you bluff him off the straight on the river, or should you check to induce a bluff from clubs or 65.

Once again, fold pre. River check is fine.