Personally I think the sex connection is a good one to keep open - as it were - if you can. Especially if it is better you think between you and your H than her and your H. I don't think it hurts to remind H once in a while what he will be losing.
In my sitch the sex side of things was pretty bad for H and OW and that definitely was a plus.
saffie
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength