NL200 99 OOP, I never know when to donkbet

[Xanta]

I didn't feel great about this flop. I think that I'm ahead most of the time here, but if I c/c flop I end up c/f a lot of turns which I'm obviously not thrilled about so I donkbet. Someone give me a better reason for doing whatever you want to do here. Comments on turn appreciated too, felt stupid and weak/tight.

Party Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $195.00
Hero (BB): $216.60
UTG: $185.40
CO: $188.00
BTN: $166.32

Reads: <font color="blue">PFR is 25/20/3 and is a little wide from the CO
Cold caller is new, mostly loose and passive and seems a little fishy. Too early to tell anything though. Didn't really feel like squeezing preflop.</font>

Preflop: Hero is dealt 9[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (5 Players)
UTG folds, <font color="red">CO raises to $8.00</font>, BTN calls $8.00, SB folds, Hero calls $6.00

Flop: ($25) 8[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img] (3 Players)
<font color="red">Hero bets $16.00</font>, CO folds, BTN calls $16.00

Turn: ($57) K[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $31.00</font>, Hero folds

Pot Size: $88.00