Jake looked down and studied the remote. He probably should have done this before, but he was too excited to try it not to.
If "AR" meant age regression, then maybe "AP" meant age progression? He could at least get Andrea back to his own age, or at least in the ballpark. He certainly didn't want to walk around town as a little girl.
He aimed the remote at himself and pressed the "AP" button. At first, nothing happened, but then he began to feel taller. Immediately, he stopped holding down the button, but then began to hit the button repeatedly. He didn't want to end up as an elderly woman.
As he pressed the button repeatedly, he saw his (Andrea's) breasts begin to form, growing larger and larger, until they stopped at about a B-cup. He kept getting taller and taller. And when his height stopped, that's when he stopped pressing the button.
He turned and looked at his reflection in one of the car windows. It looked like he was in his early twenties now. "That's better," he said, hearing Andrea's voice than his own. "Weird."