Grooms of the last time

One day, one of our friends was asking us to meet a groom in one of the bad clubs, to say the least. We met this unknown groom as soon as we arrived. His mother, of course, was the one who went to the waiter and asked for the drinks she ordered. I was very surprised. Is there such a thing? Surely this is the one who is called son. His mother, or his mother’s son...