I have just read through this thread and I kind of cringed.
What you have done is lie to your H. You have created another possible boundary.
I like Yoyo's way of extracating yourself from it....or just tell him the truth.
The way I have seen other DBers go about it is not to actually lie about there being an OM/OW but just to dress up nice like they were going out and to act mysterious when their S is around them. No actual lies told but a real feeling of mystery created. I think now though, that after telling your H what you have, he will suspect one particular OM and will not believe you if you just try to act mysterious.
What you have done is just a symptom of your desperation. Don't beat yourself up about it. Deal with it and move on. We all have our moments.
((((HUGS)))))
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