It happened when I was 17 years old. Me and my friend were roaming dhani lennevald nude the streets after dinner. That day my father just reached from my hometown, he is a politician and remains busy most of the times. When i was roaming around, my guard asked me to enter into the house as soon as possible as he has to lock the maingate.
I refused him saying it would take time. Then after we had a walk I entered into my house around 1am.
I entered into the house and went directly to my room through living room. I left the room immediately ignoring them and saying WTF.
This doesn't quite answer your question, for which I apologize; forgive me. I never saw them having sex thankgodthankgodthankgodbut I heard them on multiple occasions.