Lyrics:

So you think you're so clever, never in doubt
But I've seen you two together, fooling about
Don't get me wrong now, I've seen what you are
Mummy wouldn't like it, it's gone too far

Got to - keep it in the family
Learn to - keep it in the family
Have to - keep it in the family
Want to - keep it in the family

Playing with each other, it's your favourite game
You never try to hide it, there's no shame
You'll soon be discovered, what will you do then
Family entertainment, will come to an end

Got to - keep it in the family
Learn to - keep it in the family
Have to - keep it in the family
Want to - keep it in the family