riverspot 3b pot

flop was probably a bet but i wanted to exercise some potcontrol since i was afraid getting checkraised and didn't really know at the time how well my hand would fare against a check raising range with draws and Q+

PokerStars - $0.10 NL FAST (6 max) - Holdem - 6 players

Hero (BTN): 100 BB
SB: 113.9 BB (VPIP: 40.00, PFR: 20.00, 3Bet Preflop: 33.33, Hands: 6)
BB: 117.5 BB (VPIP: 20.00, PFR: 20.00, 3Bet Preflop: 0.00, Hands: 6)
UTG: 207.9 BB (VPIP: 16.67, PFR: 13.33, 3Bet Preflop: 0.00, Hands: 31)
MP: 100 BB
CO: 106.8 BB (VPIP: 33.33, PFR: 16.67, 3Bet Preflop: 0.00, Hands: 6)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Q:heart: 8:heart:

fold, fold, CO raises to 3 BB, Hero raises to 9 BB, fold, fold, CO calls 6 BB

Flop: (19.5 BB, 2 players) 9:club: Q:club: 5:heart:
CO checks, Hero checks

Turn: (19.5 BB, 2 players) 6:spade:
CO bets 13 BB, Hero calls 13 BB

River: (45.5 BB, 2 players) 4:club:
CO bets 26 BB,Hero??

My gut says it's thin either way. I'd make the call. I think you've under-repped your hand (post), and Villain has either done the same or played an overpair or FD strangely.

I mean, why not re-raise with KK+ PRE? Is this a thing on your site at your stakes?
87 got there OTT, but you hold a blocker.
73 and 32 get there OTR, but those are not reasonable holdings for Villain.
65, 64, 54 make 2 pair, but aren't too likely, given PRE.

Please provide as much information on your opponents as possible. I can't stress enough how vital it is to play the player and not merely your cards.

EDIT: It's not that you under-repped your hand. I think you played well OTF and OTT. It's that you have TP, which is the top of your range here. Your kicker could be better, but I don't think Villain is expecting to see a Q in your hand.
(This is assumption heavy, of course.)

Villain fires again even so hero called the river. I would think villain is beating Qx.
But one would need more information about villain.

Easy fold unless 6Max is very different from full ring.

[P] 3 Bet here seems very aggressive.
[F] No Cbet seems very odd. He might X/R you but at least you only lose 25BB total when you fold to it and you're probably squashed by his X/R range anyway so getting them out of the way is good.
[T] Call's ok here. Doesn't really tell you anything about his hand.
[R] I don't think he pushes it here with lower pairs after you call his Turn bet. You are under-represented on the Flop but not all that strong regardless. His weaker pairs can't feel secure here and we just don't see many thin bets or bluffs on the River at 10c.
I think he has a set or a better kicker: possibly over-pair.
You might want to call on the chance he holds JJ or TT but I wouldn't recommend it.