Well, I am not optimistic about my chances of reconciliation. Turns out that she's already filed for divorce and that she's engaged to marry OM.
Most relationships fail--and theirs started with dishonesty. Your shot will likely come when she sees the reality of day-to-day life together and less time with the kids, or the once convenient relationship runs its course. By then you may have decided not to retry with a cheater, when there are many great women out there.
I do wonder what drove the speedy engagement--e.g., the affair has been ongoing longer than you realized, or your ex is afraid to be alone. Great job staying strong! Don't be afraid to cry alone.
