Is my turn check here standard or do you keep betting? What if you get raised?

$0.25/$0.5 No Limit Holdem
5 players
Converted at

Stacks:
UTG ($57.15)
CO ($199.00)
BTN ($12.70)
SB ($50.70)
Hero ($49.25)

Pre-flop: ($0.75, 5 players) Hero is BB [4h]
1 fold, CO calls $0.5, 1 fold, SB calls $0.25, Hero checks

Flop: [3c][6s] ($1.5, 3 players)
SB checks, Hero bets $1.5, CO raises to $3, SB folds, Hero raises to $9, CO calls $6

Turn: ($19.5, 2 players)
Hero checks, CO checks

River: ($19.5, 2 players)
Hero bets $14