From panty wixxing to creampie fucking!

My flatmate has come up with something really stupid again! He probably thought I was already out of the house... I actually caught him in my bed wixxing with my panties! What was he going to do with them? Wank all over him and leave it for me? Is that still possible? At first I was really annoyed but the second moment I had a much better idea of how we could soak the panties together...