Just as I thought. But you know what might be fun Mandy? Every now and then - like once a year maybe - and with the agreement of your husband of course. Make it look like you're coming on to your ex, say it's for old times sake or even that you pity him, and let him think that you're going to fuck him. Then close him down firmly. I think all three of you could enjoy that but your ex would never know quite what was happening.