It's in her best interest to leave

"I can't think of anything I'd rather do than fuck you all day and night Grace," you say as you cuddle her. "And we will. But if my roommate comes home I could be fired, and then it would all be over."

"Over?" she asks with a surprised whimper, pulling her face back to look at you.

"Over. They'd fire me, or worse, and I'd have to leave and never see you again." You feel a momentary guilt for manipulating the girl, but you reason that it's in her best interests as well as yours.

"That can't happen," she whimpers, stroking your cheek. "It can't. I need you again Mr. Carter. I have to have you."

"That can happen Grace, but if it's going to happen you have to leave now. Leave before my roommate gets home and catches us together."

"Yes..." she whimpers. "I understand. But later...later you'll fuck me again? And teach me? I need it Mr. Carter. I need to learn."

"I will," you promise, sliding out of her embrace and standing up, helping her to her feet. "Put your clothes on sweetheart," you urge her, handing her shorts and top to her as you hurriedly tug your shirt on. "Come on darling there is no time to lose."

Anxiously biting her lip she obeys, pulling her top over her head to hide her sweet little breasts, then tugging her shorts up her long toned legs. She insists on another embrace before you urge her to the door, almost pushing her down the stairs to the front door where she coils into a last embrace.

"I'll be back," she purrs, breaking a kiss at staring at you with wanton eyes. "I'll be back for another lesson Mr. Carter."

"I'll be waiting," you reply hurriedly, breaking her embrace and opening the door, watching her scamper down the path before you close the front door.

A narrow escape, you think gratefully, wanting a drink very much, but deciding to settle for tea.