Villian just sat down a couple of hands ago...

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.05./$0.10.
3 players


Stack sizes:
Hero: $10.07
SB: $6.90
BB: $5.80

Pre-flop: (3 players) Hero is Button with
Hero raises to $0.35, SB calls, BB folds.

Flop: ($0.8, 2 players)
SB bets $0.8, Hero calls.

Turn: ($2.4, 2 players)
SB checks, Hero bets $2.4, SB raises all-in $5.75, Hero ?????


It's $3 and change to call. Anybody fold this? I just don't buy him having a King here for some reason.