Although to be fair, having sex with your wife is not the same as having sex with a new girlfriend. They don't kiss like a real bf/gf would. They peck each other on the lips every so often. I don't know if it's fake or not, but Kami does not act like a true girlfriend around the guys she's with and the guys don't have the drive that a typical guy would have in their situation.
I guess it's probably just the cams, but she's a veteran by now so enough with the fake modesty.