Husband..
There has to be a reason why she is reacting so strongly...Probably, it is insecurity.
Truthfully..my husband has had similar fantasies (as well as others) that we would never act on...
Have you ever watched a porn movie with her? Admit..the first time I did it was a bit uncomfortable, but since he was brave enough to share his intimate thoughts with me I wanted him to at least have an outlet for those fantasies that we could share.
So when the mood stikes us we have a few fvideos or him and a few for me!