Oh God, please let this be a real question, because if it’s not, then it’s by far the most brilliant phony question submitted to the site. To answer your (almost certainly fake) question, it depends on a number of factors. Guide yourself through this series of questions (and try not to sleep with them) to find the knowledge you seek.
Did you have sex with a man (or men) other than your husband? If yes, then you are a cheater. BUT:
Were you unaware at the time that the man you were sleeping with were not, in fact, your husband? If yes, then you are not a cheater, but simply the victim of a con as time-worn as the Mexican soap opera. HOWEVER:
Did you have sex with both of them at once? If yes, your case is looking weaker by the second. UNLESS:
Were you in the midst of a violent attack of amnesia, retrograde amnesia, or perhaps trapped inside an episode of Three’s Company? If yes, then you are still a cheater, but few would hold it against you.
I have a lot more questions, mostly about whether doing your husband’s clone would count as cheating, whether identical triplets have secret handshakes, and what kind of brother porks his sibling’s wife without her knowledge and expects not to get all kinds of arrested.
If you’d care to answer any, or relate your tale in the form of a 30 Rock spec script, the comments section is below. And remember, the key to a good story is in the details!