I have got to share this one with you lot:
This happened very recently to a friend of mine in the army, not proper army, but Signals.
Dave had been away for a while, and his wife like all army wives was waiting patiently until her hubby came home......insert joke here.....
The amourous couple were enjoying a bit of hands on experience on the couch about nine ish when their four year old lad walked in and saw mummy bent over the arm of the couch and daddy well you can guess where daddy was. Their kid cried, screamed and ran out. Bless him Dave was good to crack on, but his missus had lost her mojo a tad.
Forgotten about until about four weeks later, when Dave walked in on his four year old. He had somehow lifted his 18mth old brother onto the arm of the couch, and was banging into him like a soldier coming home after 4 months away. He was smacking his younger brothers nappied arse and laughing hysterically.
Dave nearly pissed himself with laughter, his wife has still not recovered.
That is the most disturbing story I think I have ever been told.....fooking funny tho