NL20 99 2nd pair on paired board

Prima, $0.10/$0.20 No Limit Hold'em Cash, 4 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $12.12 (60.6 bb)
Hero (BB): $41.16 (205.8 bb)
CO: $23.55 (117.8 bb)
BTN: $16.74 (83.7 bb)

Preflop: Hero is BB with 9♦ 9♣
CO raises to $0.80, 2 folds, Hero calls $0.60

Flop: ($1.70) K♦ K♣ 2♥ (2 players)
Hero checks, CO bets $1, Hero calls $1

Turn: ($3.70) 5♠ (2 players)
Hero checks, CO bets $1.80, Hero folds

17/14, 25% CO open, 36% agg.freq. Cbet flop 75%, turn 50% (6), 784hands

On the turn? His bet looks to me like thin value, but my hand is probably good enough to call for this price?

I was also thinking about raising turn and betting the river to make him fold TT-AA by the river? But perhaps this is a call and i might try that with some Ahigh hands?