Many of them believe cybersex to be similar to pornography—an extension of fantasy that actually helps to keep them from physical affairs with other people.
Without knowing she didn't erase any pictures which were all shared with her icloud account.
The private nature of online affairs may make them less painful for the betrayed partner as well.
Moreover, when online affairs are revealed to the significant other, which is done more often than when offline circumstances are involved, it could be considered as something less than cheating.
Time spent in that world can help them their actual world, while not giving up on having exciting, even emotional experiences.
Living within the two worlds is not easy, however, and may become increasingly risky when people do not realize the limitations of each.