My boyfriend has a small group and a very good female brother. In the name of "brothers", the two of them often have some excessive words and behaviors. They always believe that these are normal and persuade me not to care about it. It wasn't until my male best friend showed up that my boyfriend's jealousy soared. He said he would keep distance from his female brother, but in fact he still favored her. It wasn't until his true face was revealed to everyone that he completely panicked.