I think I needed to drop the hammer on that turn. Possibly even push more on the flop. I couldn't see calling for $18 more here...but raising more earlier would have done better at getting out the riff raff and making this easy to call.

What do you put SB on here?

Party Poker No-Limit Hold'em, $ BB (9 handed) converter

MP2 ($15)
MP3 ($49.25)
CO ($48.5)
Button ($31.45)
SB ($47.65)
BB ($7.1)
UTG ($61.75)
Hero ($28.05)
MP1 ($9.25)

Preflop: Hero is UTG+1 with J, J. SB posts a blind of $0.25.
1 fold, Hero calls $0.50, MP1 calls $0.50, 3 folds, Button calls $0.50, SB (poster) raises to $0.75, BB calls $0.50, Hero calls $0.50, MP1 calls $0.50, Button calls $0.50.

Flop: ($5) J, 3, K (5 players)
SB bets $0.5, BB calls $0.50, Hero raises to $3, MP1 folds, Button folds, SB calls $2.50, BB folds.

Turn: ($11.50) A (2 players)
SB checks, Hero bets $6, SB calls $6.

River: ($23.50) T (2 players)
SB bets $18, Hero folds.

Final Pot: $41.50