weak overpair limped pot

How's my line? Advice on all streets is welcome, including preflop. Villain seems to be playing alot of hands preflop, but he's in the BB here, but he doesn't seem to be overly agressive postflop. I havn't seen him for long though...

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) FTR converter on zerodivide.cx

Button ($105.10)
SB ($100.40)
BB ($164.40)
UTG ($99.15)
UTG+1 ($63.20)
MP1 ($29)
MP2 ($131.65)
Hero ($89.50)
CO ($115)

Preflop: Hero is MP3 with 9, 9.
UTG calls $1, 3 folds, Hero calls $1, 2 folds, SB completes, BB checks.

Flop: ($4) 2, 8, 6 (4 players)
SB checks, BB bets $4, UTG folds, Hero raises to $10, SB folds, BB calls $6.

Turn: ($24) A (2 players)
BB checks, Hero checks.

River: ($24) Q (2 players)
BB bets $10, Hero calls $10.

Final Pot: $44

I don't think a TPGKish hand value bets the river. It wants a cheap showdown and you've already shown a willingness to check behind. I think he flopped 2 pair and was afraid you paired your Ace as well.

I would have laid down this river bet, but I wouldn't have checked the turn like you did.

If you take on the roll of the aggressor on the flop, carry it through to the turn. You checking on the turn looks like you were scared of his flop re-raise call. Make it look like you want to continue to build the pot, even with an ace on the board. Are you scared of the ace? If so, bet at it. If you aren't, bet at it.

If he has you beat, I'd put him on an over 88 pair or set. Usually you are winning on this flop though, so continue betting at the pot.

bet the turn

Raise this up prf to an amount you think will buy you the button.
Raise turn. Fold river