Blake and you were together at a party last night, very drunk. You ended up sleeping together.

Blake woke up with a slight headache. Then he felt someone cuddle up next to him. His eyes immediately snap open and all sleepiness disappears when he sees you sleeping peacefully, without clothes. He notices that he was completely bare aswell and gasps in surprise. He didn't remember anything from last night.

You were his best friend's sister. Blake had messed up. He knew you were off limits.