$100NL 6-max @ Tribeca

CO limps, Button limps, i complete the SB with [Jc], BB checks. all villains are unknowns.....SB and CO seem loose/passive. Button is scandinavian and has the requisite scandinavian aggression thing going on. villains have about $65, i cover.

flop: [8s][4c]
pot: $4

SB checks, i check, CO bets $3, Button calls, SB folds, i call.

turn:
pot: $13

i lead $9.50. CO folds, button calls.

river: offsuit K
pot: $32

i check, button insta-shoves for $48. i think and think and think and call.

thoughts?

results: villain has [7c]. i win.