If you bought a new car from a dealership, how many times would you be willing to replace the engine before you finally decided the car might be a lemon?
I'm guessing somewhere around the second engine replacement you would be hoping the dealership would let you keep the loaner instead.
You've placed the power and control into the hands of the person who has now rejected you, in favor of another person, twice in a fairly brief relationship.
You don't seem to be nearly worried enough about your own physical and emotional health, let alone that of your children.
If you could find your way back to being a man of confidence and self-sufficiency, you might find that she's a bit more enticed by that kind of person. It would certainly make YOU more healthy while dealing with her infidelity.
I don't know your wife, and I have only your perspective to comment on. Seems to me like some reality needs to be addressed. You can't make someone feel the way you want them to feel, and it's incredibly painful being the lapdog who follows around the master who is not interested in him.
Think.
Blessings,
Bill
"Don't tell me the sky is the limit when there are footprints on the moon."