What's worse You mum walking in on you having sex with your lass/bloke or you walking in on your mum and dad
your mum walking in on you, for sure. the image of your parents at it isnt one you can get rid of in a hurry (not that i know, thank fuck...)
Your lass fucking your dad. And if you'd seen my mates mam you'd know there's nothing wrong with fucking ya mates mam.