10NL full house facing river shove

[Woody317]

Sorry no hand history for this one. Only read was that he'd shoved previously and i'd folded. About 3 orbits ago. He seemed loose passive preflop but seemed fairly aggressive postfop.

Villain (CO): $19.46
Hero (BB):$19.32

Hero gets dealt: 4 [img]/images/graemlins/spade.gif[/img]7 [img]/images/graemlins/heart.gif[/img]

Preflop: CO, Button limp. SB completes, Hero checks.

Flop0.38) 4 [img]/images/graemlins/heart.gif[/img]K [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/diamond.gif[/img]
SB checks, Hero checks, CO bets 20c, Button calls, SB folds, Hero raises to 0.90, CO calls, Buton folds

Turn2.28) 10 [img]/images/graemlins/diamond.gif[/img]
Hero bets 1.68, CO calls

River5.48) 10 [img]/images/graemlins/spade.gif[/img]
Hero bets 1.74, CO raises to 16.78, hero??

Is this an auto fold? Can i really expect to see a bare king here? Comments on all streets would help.