Have you spoken to your sponsor about it? That might be where I would start, as it could affect your sobriety. Otherwise, you might consider a counselor if you don't already have one. Because you are right there are women who are ready to step in if given the chance. But that doesn't mean that your husband would be open to the idea. You have a lot in common. Try not to blame him for what this female does. Work the fourth step on this subject. Lack of trust is a big issue, don't take it lightly, or it could harm your relationship.