Looking for a accidental BF's roommate fuck story

[swarlesincharge]

It was a story where a girlfriend goes out drinking while her BF and his roommate stay home drinking, the BF and the roommate fall asleep in the wrong rooms and the GF comes home and starts fucking the roommate.

I remember that the story starts with something like "how did I end up here fucking my BF's roommate in the kitchen."

Any ideas?

EDIT: I found it