I have a couple like this around me. This man is a playboy. Sometimes even when he meets a girl on the road, he can get her contact information and keep in touch. In order to go out to see this girl, he will cheat his girlfriend for various reasons. After a long time, my girlfriend will naturally not believe it. Over time, no matter what he says, his girlfriend will feel that he is lying to her. Even if it is true, her girlfriend will pay special attention to his itinerary. Always asking him where he is, sometimes he will be annoyed by his girlfriend's questioning, pretending not to see him or simply turning off his phone. If his girlfriend can't find him, she will think that he must have done nothing good. They will quarrel when they get home, because he didn't reply in time when looking for him. When he gets home, he will say that his girlfriend doesn't believe anything. After a long time, he will be too lazy to explain, and his girlfriend will think that he must be guilty and even more angry.
If he really goes to see other girls, he can't say anything when his girlfriend asks. When he is not around the girl, he will quickly send a position to his girlfriend and tell him what he is doing. His girlfriend will still ask him what he was doing just now. Their later state was that he had to make a sound when he sent it, and he had to make a sound when he didn't send it. They quarreled when they were talking. Later, he got bored and talked less and less with his girlfriend.
In fact, I think that once two people lose trust, their subsequent communication largely depends on the attitude of the deceived. If he realizes his mistake and corrects it, and can rebuild trust, then the two can make up. And if he takes it for granted that I lied to you, you have to believe me, then there will generally be no happy ending.