This is the most important thing you can let your husband know if you want him to believe you will continue to be sexual with him in the future. Withholding sex is counter-productive because that is exactly what he fears you will continue to do in the future if he returns. He might be thinking "If she withholds sex now in order to get me home, she might withhold sex next year because I'm working too much or not doing my share of housework or just because she's in a bad mood."
I think it's great that you've been participating in some of his sexual fantasies and have been able to let go of some of your inhibitions. Why not think up a couple fantasies of your own? If you don't know where to start, order a book of women's erotica from Amazon. I can almost guarantee that if he's the typical HD male and you call him up and tell him what YOU want him to do for YOU sexually instead of just doing what you think he might appreciate, you will really get him thinking that you aren't just faking it. Besides it will be super fun for you if he does what you like- a win-win solution.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver
