Lets say I hold A [img]/images/graemlins/diamond.gif[/img]3 [img]/images/graemlins/diamond.gif[/img] and I'm HU.
Flop is 4 [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/diamond.gif[/img] 7 [img]/images/graemlins/spade.gif[/img]

Other guy bets out and I suspect he holds a K.

Now, is it worth to call? 1 time out of 3.5 I'll hit my flush but since there are no other bettors, this seems like a bad call? Correct? Obviously I could spiker an A too, but still...