So, you are faced by a dilemma: as it is possible to force the wife to admit treason and whether it is necessary to do it, it will be inevitably followed by crash of the relations. That the wife cooled down and brought the lover on the party is wine and the husband. Means, he made some mistakes and made something that gave an impetus to destruction of the relations. But if everything to find out desire it is too big, some of three ways can go.
How to make so that the wife admitted treason?
It is simple to strengthen tension degree. It is clear, that and so it is necessary it hardly, she is forced to be on the razor-edge and to lead a double life, trying not to deprive of attention of the lover and at the same time to spend enough time with family that blessed had no suspicions. On it it is also worth playing, having strengthened pressing: to constantly call and control its actions, whenever possible not to leave one for a long time and to look for a way to spend time together. It will be heavier to lie and dodge it, so the chance is high that she admits everything.
The second way opposite. It is necessary to give the wife a free hand, but at the same time having to the maximum surrounded it with attention and care. Present that it is your honeymoon. You give blessed flowers, look after her, arrange a romantic dinner by candlelight. Of course, she will be able to notice such change and a remorse will begin to torment her. This method will suit those men who want to hold darling near themselves. The chance is high that she will regret, will understand what value the husband has for her and will phase out dealings on the party.
If the wife changes and does not admit, becomes that who is interested as it is possible to force her to admit treason when time goes and to play a role of the loving spouse with horns on the head intolerably, it is possible just to cause blessed on straight talk, at once having told what all of you know. It is unlikely it will open and admits everything.