As a betrayed spouse of a stay at home mother, I get the willies just reading the OPs callousness. Why should any man ever care about any woman enough to provide her a home and children if this is how she returns the favor? I have to guess she is now at home not working still on his dime but without the yucky constraints of having to pretend to be faithful to him for all his work and effort and commitment.
I think I said earlier that you have already done the deed of lying, cheating and betraying the man for so long what's the difference if you keep your dirty secret another 50 years?