[bsball8806]

Meh, if he only has a high heart, you're laying him 2.6:1 odds, so if he calls it's a bad play. You'd actually rather him have the Ah than Kh, because if he has the Kh, it give him 3 more outs to beat your pair of jacks.

I think the thing we have to worry about the most here is him having a pair of jacks with a flush draw. In that case, he has 9+3=12 outs, still not giving him odds to call.