This my first post here, and I'm not sure where to put it. We have been married 17 years. I'm 43, she is 39. My wife is very hot at 39, and very good with sex. She sucks and swallows, and loves it when I eat my cum from her pussy. She won't take me anally, but will cum almost instantly if I rub a lubed finger around her anus. Same for me if she does it. Anyway, here is my problem. She has two younger sisters, both equally as hot as she. I work with her middle sister in the same facility. Depending on the project we have going, sometimes I'm around "Pam" more than my wife. Two or three times my wife has told me that she has dreamed that "Pam" and I were having sex. I had never really thought about it before, but now when I'm around her about all I can think about is fucking her, eating her, cumming in her mouth. I didn't have this problem before my wife dreamed it had happened. I even fantasize about her when my wife and I are together. I was hard or semi-hard all day Christmas when I was around both of them. "Pam" is also married to a real a**hole that no one in the family even likes, and I know he treats her bad. It is driving me crazy.