I was in the same boat, It was a while that she was under the belief, that there was no way that I literally wanted her to go out and actually fuck another guy, and then come back and tell me all about how they made out, how he fingered her and ate her pussy to completion, then fucked her into oblivion! When we finally had her setting up with her "First date".. I remember her getting ready, and it was very surreal for both of us, She was still very much in disbelief that it might actually happen, and more worried that I would not be as happy as I was thinking I would be! I was one hundred percent HARD the entire time she was gone! after a while, my phone rang... She was on her way home! she sounded Gitty, like kid on Christmas Morning! when she got home, she began to tell me everything in graphic detail, while handling me...which led to some of the best sex we have ever had! I think that my reaction to her describing to me, another man Eating her out, fingering her and running his length through her, solidified for her, that I really did want this for her! That must have been the reassurance she was looking for, because her second encounter
