"Sister" is just an excuse, just like the "fitness instructor" in the address book is actually his lover;

If a man and his girlfriend get along for too long, such as more than five years, there may be signs of cheating, but as a responsible man, he will try at most once and feel very guilty;

But your boyfriend is different. He is one after another, and he will do it again after you find out, which means he doesn't like you anymore, even a little tired. Not telling you the password of the chat software means that he no longer trusts you and your relationship will be over. ...