If your man had an affair with other woman/ women, are you going to forgive him? How far can you accept of having an affair? Don't worry, it's not happen to me, yet.
Here I came out with this example. Your man is just like your underwear, it's so close and intimate to you that you probably wont like to share with other women. But one day, your underwear was accidentally wore by another woman, who knows for what reason. Let say you didn't find out in the 1st moment and you still wear it like usual. But after sometimes you found out that was worn by others once in the time, will you just straight throw the underwear to the dustbin and never wear it again? Or since it was just once in the time and was happened accidentally, some more you found out after quite sometimes, so you will just clean properly the underwear and continue wear it as usual?
What if you immediately found out the underwear was wore by another woman? Will you still wear that underwear? Imagine that's your beloved underwear, that so suit you. If you cant accept that someone was wearing it before, will you just throw it away? But that's your beloved underwear, good in quality (at least you believe it quality's good) and you've been wearing for years. Maybe you feel hard to throw away, then you will just keep in your drawer for memory purpose but never want to wear it anymore?
The examples are just that if the underwear was wore by another woman (one), not women (two or more). Think of it, what will you do? Well, for me, I guess no matter it was wore by one woman or two women or even more, and no matter I find out immediately or after sometimes, it's still the same answer. I will throw it to the dustbin and never wear it again. There's plenty of underwear in this world, who knows I cant get a better one?
One more question, I don't understand why there's women who don't mind wearing others' underwear?