Wait for some time, do not rush to call her husband back to you. Perhaps soon the passion for another woman passes, he will realize that it was a passing fancy, and he will be ready to return to the family. Now you have the time to analyze what in your marriage has gone wrong, where you make a mistake, than her husband was constantly dissatisfied, and how it can be corrected?
Go to a beauty salon or spend the cosmetic procedures on their own. Optionally, to radically change the image, enough to make a refreshing mask, tidy hair and nails. Update your wardrobe by choosing a trendy and bright things. Now you should always look very beautiful and well maintained, that will attract the attention of her husband.
Keep calm and balanced communication with her husband. Do not try at every meeting to sort things out, and do not need any tears, tantrums and scandals. Let him see that you have to endure difficulties, your life will not stop you - a strong woman. Husband will see you in a new light. Your new feature of his interest, and this is a half-step in your direction.
Do not force her husband daily meetings until sufficient to meet only when necessary. Well, if you occasionally will disappear from his sight (leave on vacation to family or friends).
Arrange a dinner party, to be attended by your old friends and acquaintances together. Call him my husband, he will be glad to see him interesting people. Prepare your favorite dishes of her husband, be in a good mood and try to keep the conversation interesting for all. Create a little world in which he has always been a pleasure to be and wanted to go back again and again.