An Uncontrollable Urge

A deployment is a long time alone for a beautiful young wife like Jennifer. When some of his fellow soldiers give their wives permission to play, Evan is encouraged to give Jennifer permissions of her own - and he does, if she has an "uncontrollable urge". Evan is wounded before they work out the details, and when he awakes from a coma weeks later he learns Jennifer has gone far beyond what he had anticipated as she satisfies more than a few of her uncontrollable urges, guided by Evan's black Army buddy.
Evan's only question? What now?