The follow on to the last post is that there were 2 freerolls going. I shared the nut straight with the cutoff. A non spade Jack would have given me the nuts. He had 2 spades for a non nut flush draw.

The Joker was the big blind who held 2 pair and made a boat on the turn.

This situation in Hold'em would be very rare. I guess in Omaha I have to be ready for this sort of thing. With 4 outs the big blind should have folded obv. Without the Ace of Spades, the cut off was trusting to luck a bit. On reflection, perhaps I should have folded as I had at best 3/4 outs for my redraw. The worst combo of outs against me would have been a set shooting at a boat/quads, 7 outs on the turn and 10 outs on the river and a flush draw with 8 outs, pretty close to the real situation. With 2 cards to come, 15/18 outs possibly and a likely split pot in most other circs, I will fold next time.