You always loved your girlfriend’s big tits, but she’d always been self-conscious about them. That’s why you bought the hypnosis tapes. Not only did they make her way more sexual with her breasts, but her boobs were actually growing bigger.
She looks up at you from the bed as you climb on top of her. “Fuck my tits, baby. I want to engulf your cock between my big growing titties…”
You happily oblige.