Fashion Business is absolutely not a cheating game, unless you count the fact that Betty is cheating on her husband, Ralph. But I wouldn't count that as making it a cheating game, since Betty and Ralph are just supporting characters, and there are only a few scenes of her cheating.
Don't get me wrong. I think that Fashion Business is a pretty good game, with tons of erotic content in it, despite the fact that it's a horrible grindfest of a sandbox game. But to list it as a cheating game seems completely incorrect to me.
Office Wife, on the other hand, definitely has cheating in it, in addition to the hotwifing and cuckolding. I dislike cuckolding, as a general rule of thumb, but that game has enough content which I really like to keep me coming back for more.