Is Wife fucking other men? Please Vote

Me and my wife have been married 10 years, we love one another very much but it needs some shaking up so about six years ago I told her I wanted her to start fucking other men while we were having sex. At first she played around with me for about the first three years and suddenly out of the blue about three years ago all of a sudden she become truely upset about it so I never brought it up again. The flair up came after she had been out of town for a few days. She says she's never went out on me before and she has never lied to me before. She works long hours and most of the time I call her at work she is at work it's just that sometimes they say she is on her way home and she takes longer to get home. She always has an excuse but sometimes I wonder. She gets along great with her co workers perhaps too great. They call her all the time wanting her to go out with them she never does and when I ask if she has anything planned on her days off she says maybe. What do you think.

Dan Boner