Why has the lover emerged?
Lovers usually appear due to family boredom. When people live well together, they are not out for trouble. It is lack of communication that pushes spouses to find happiness with another person. Indeed, if everything is constantly the same at home, conversations are short and unemotional, sex is rare, can it then be called a family?
If there are no objective reasons for coolness it's time for the alarm. In general you should become alerted, if your next day is like the previous one. Long family union is a perfect ground for the development of boredom. The farther are spouses from each other, the more difficult it is to return back the former freshness of relations. The next step here can be the emergence of "parallel lives" of two persons, and hence divorce.
To make the former freshness of relationship possible, both spouses should need it. Only thus they can help themselves. The husband and the wife must understand that it is necessary to arrange vacations from grey weekdays, leave alone together, so that nobody and nothing could disturb you, repeat honeymoon from time to time in favourite places.
The wife can do a lot to preserve the family. For example, she may simply pay compliments to her husband, maintain his self-confidence. You can arrange pleasant surprises, praise your husband in other people's presence and so on. Husbands should behave in the same way: constantly express admiration for their beloved one, even if they have already been together for a long time.