She's used to being used by the prince, and she's alright with it. He likes it rough, but he's never cruel. He's incredibly lonely though. She found that out early on even though he'd never admit it and would probably bite her head off if she said it to his face. So she just hurries to his quarters when he sends for her and does what she can to please him. She usually enjoys their nights together, too.
She lies in the dark by his side until he falls asleep, and then she presses a gentle kiss to his temple, the kind she thinks he'd like, but would never allow, and slips out of the room.
In the darkness, Loki smiles.