Villain is 40/10. Thoughts on my river c/c line?

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

saw flop

MP2 ($29.75)
MP3 ($53.80)
CO ($50.60)
Button ($55.25)
SB ($10)
BB ($8.75)
Hero (UTG) ($53.80)
UTG+1 ($13.75)
MP1 ($9.60)

Preflop: Hero is UTG with 10, 10
Hero bets $2, 4 folds, CO calls $2, 3 folds

Flop: ($4.75) 5, 9, 2 (2 players)
Hero bets $3, CO calls $3

Turn: ($10.75) 8 (2 players)
Hero bets $6, CO calls $6

River: ($22.75) 9 (2 players)
Hero checks, CO bets $16, Hero calls $16

Total pot: $54.75 | Rake: $2.70