Forbidden affair with the brother-in-law! Creampie

The whole family was there, it was going to be a big party! I had some work to do on my laptop, so I was sitting alone in the flat. Then my brother-in-law came to see me because my mum had sent him to get the salad and preferably take me with him... The only thing nobody knows is that when I'm alone with my sister's future husband, pretty forbidden things usually happen!