I'm traumatized! I opened the door while my parents were having intercourse.
Eek! Have you caught them before?
It wasn't the first time I saw them in action. The next day, when I came back home, I repeated what I saw to my younger brother.
It is wrong to watch your parents have sex. It is even more disturbing to tell your sibling about what they were doing.
People should know how their parents communicate, and should get educated on how they can improve their own sex lives so they can be as productive as my parents.
While it does seem like your parents have a close and loving relationship, this isn't something to be shared. Telling your brother what you saw may do more lasting damage than you realize.