Here's a short, quick, little introduction to this story, so you know where we are when the story actually begins.
She wanted him. She had heard about how good he was from the other girls, and she knew she wanted a piece of the action, to see if they were all right. Plus, she had always somewhat had feelings for him.
He was willing to oblige. The male had a history of being willing to take you to the bedroom as long as you were pureblood, a witch, attractive, known to be fairly good in bed, and not a Gryffindor.
So it happened one night, and the two fell asleep next to each other in Draco's bed in the (Slytherin's (male, obviously) dormitory, Robyn, the witch mentioned here, being told by Draco "Goodnight, love," and Robyn replying with "Goodnight, my beloved Draco." The two are beginning to develop deeper feelings than lust, whether they know it or not.
This story begins the morning after it all happened, a few hours before breakfast time in the Great Hall.
