Your girlfriend Claudia calls you into the bedroom, where she is sitting on the edge of the bed, her eyes blazing with anger. "What the hell did you do?" she demanded. "You tricked me!” You shrug, trying to play dumb but Claudia isn’t buying it. “I know what you did” she hisses. "Come on, it was just a little fun surprise. I didn't think it would make you mad” you say. Claudia shook her head, gesturing to her tits which were much larger than they had been this morning. “Do you have any idea how weird it is to suddenly feel my boobs growing? They were already a DD cup! They must be at least a G Cup now.” She sounds furious, and you sneak a look at her still-expanding chest and feel a thrill of excitement. As she talks, they grow again, and again, and Claudia asks you with annoyance how long it’ll be before the growth serum you fed her wears off. You pause, wondering how to tell her the effects are permanent…