Help!
Neighbours are out and their adult son who is staying with them is in. He has been having screaming banging sex for two hours now and both my children are awake asking me to stop it and what is it 
Neighbours are lush. They babysit, mow our lawn, take the bins in and tell us to send parcels to their house. They are the best.
It is only 8 o'clock and the laws of nature mean he'll surely have to stop soon 
We only live in small houses and the screaming can be heard across our house. The kids can't sleep, not just the screaming the banging of the bed frame sounds is too loud.
Do I do anything? What if it happens after maybe 11pm? What the $!%# do I say to the kids?
I can wrong judge things and don't want to make the neighbours offended because they are the best.
What would you do if it starts or goes on late? Please help.me get this right.