Apparently so, according to the ever reliable Daily Mail (I’m being sarcastic for those of you who aren’t British) 37% of women have done it! For guys ‘wet dreams’ which is cumming while they sleep, is a pretty common occurence, especially during the teenage years. Personally you are the first woman ever to mention it so in my experience it’s MUCH rarer than they suggest (a LOT of women tell me a LOT of things they never share elsewhere, trust me).
Obviously since you have no control of it it’s technically not cheating denial, but stop it anyway! Good girl 😉