Secret SMS group of childhood friends

You should be generous and don't be petty, because you are jealous of such things. He just cared about her and didn't do anything out of line. You should be tolerant and generous. People always have one or two childhood friends. As long as you don't lose your discretion in communication, you shouldn't be too haggle over every ounce. I suggest you also take the initiative to care about his childhood sister. Strive for everyone to live in harmony.