[Andy B]

Well, to this point I think you've played it right. I can't see betting fifth. On sixth, you might well be winning on the low side, but the caller does have four cards to a hand that beats you showing. There are three Fives left in the deck which should give you a sweep, and three Aces which should give you half. The pot is tiny, though. I say fold and note well what these jokers show down.