how many married women or men do you know that have cheated on their spouse and the spouse has no clue?

NONE You always have this gut feeling, you just don;t want to believe it.

I know a lady that her Husband cheated on her for 9years with the same person and didn't find out until her son found a tape hiding and popped it in and asked his mom why his Dad had a tape of (her Name) masterbating! Sadley their kids grew up together and the lady considered her as a friend and didn't have a clue and thought her marriage was fine! Sad I know!

NO such thing is not having a clue. Its called common sense, intuition , paying attn to ur partner. Trust me cheaters always give away small clues that lead to bigger things. Affection, time being spent at home, sex, etc. I dont know any married women or men they have cheated on their spouses without them finding out in one way or another.

I know a few mwn and woman, they are still getting away with it, for some it has been years

None - I figure some have done it - but that's why they don't tell anyone - they don't want it getting back to their spouse !!

Believe me they all know one way or another. You can't hide a fire with paper. It only depends on their state of mind, if they want to keep the marriage, they pretend they don't know so the other one eventually give up. If the spose want to get out of the marriage, they'll keep fighting so they can get out of the marriage.

a few...

none. they all found out

None

I think they usually do have a clue, they just choose not to see what is right there in front of them