I do feel very bad for my kids, especially the boys (S14, S10). I felt they deserved the same "intact" family that D20 and D18 had until age 18, and they are the major reason I'd forgiven and been working so hard for over two months despite my wife's infidelity and obstinance. But I finally reached a point where I felt that for me to stick around any longer would be to condone the behavior, and I would also have no integrity knowing that my wife had fallen out of love with me awhile ago and knowing that she was continuing to cheat.
They will at least grow up learning about character traits such as fighting for what you believe in, working at what you've committed to, and being loyal to whom you have pledged yourself, not to mentioning honoring your vows to God.