How do I deal with an ex-friend who is starting rumors to harm my name and marriage?

[Another Crone]

Ignore the fact she breathes. Hear nothing of what she's said. You don't deal with her because there simply is no reason to do so. Just tell your husband, shake your heads together, give each other a hug and don't let it have any effect on your lives at all. When mutual friends try to kick up the dust, tell them that you aren't interested in playing and that your life is already full... no room for that stuff. Done with it.

All bugs try to give one last bite before they curl up and die.