Villian is an average donk.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players


Stack sizes:
Hero: $155.65
UTG+1: $56.25
CO: $45.90
Button: $60
SB: $12.05
BB: $42

Pre-flop: (6 players) Hero is UTG with
Hero raises to $2, UTG+1 calls, CO folds, Button calls, SB calls, BB folds.

Flop: ($8.5, 4 players)
SB checks, Hero bets $7.5, UTG+1 folds, Button calls, SB folds.

Turn: ($23.5, 2 players)
Hero bets $17, Button calls.

River: ($57.5, 2 players)
Hero checks, Button bets $18....?

i really cant think of a hand you beat except a overpair. The bet is also small so it looks like he wants you to call and not a bluff. im pretty positive you are behind. You are getting 4.2-1 however. i guess i still fold.

Calls? I think I call and expect to lose a lot...but 4-1