<human>: Can you provide a brief overview of the text?

Was speaking with housemates the other day and we were all talking about ours - usual didn't hear mum coming up the stairs she opened the door etc. etc. 

It then gets to my housemate that always has the weirdest sexual stories. I thought I would share this particular one with you, reddit.

So for the sake of the story lets call him Jeff. Now Jeff is an unusually horny guy. So he's up late one night in the lounge watching babestation (For those outside the UK babestation is like a livecam show where women do slutty things on tv for people who text/ring in. etc.) It was dark and the rest of Jeff's family are in bed. So he decides it would be the perfect time to try and knock one out. 

As he get's into it he hears the creak of the stairs and freezes but quickly gets back into motion after putting it down to just his imagination. He's really getting into it when he hears the door start to open - he cant react quick enough to pull up his pants so he throws himself forward onto the foot stall in front of where he's sitting. It just so happens to have the DVD controller on and he accidently hits the play button.

Earlier that day his family had been watching some old christening videos or something like that. Some sort of family home video. 

His sister is the one that walks in with Jeff (pants round ankles) bent over a foot stall with a home video of his family playing on the TV. 

His sister turns around and walks out. They have never spoken about it since (was about 6 years ago).
<bot>: Housemates sister walks on him whilst it looks like he is pleasuring himself on a foot stall to a DVD of his own family