Bless Sammie with large breasts

There is a magical salve that some upper-class ladies use to "enhance" themselves. As luck would have it, an instantaneous perusal of the local alchemist produces a jar. You take it back to Sammie and start rubbing it into her breasts. The jar gives no indication of how much you should use, so you go ahead and apply the entire contents. It's not like you're being put out, after all.

"Okay, you've all had your sport," says Sammie as the boy lets her down. She covers herself as best as she can. "Now, who is going to lend me a shirt?"

Before anyone can answer, the salve kicks in. There's an audible "boing!", and two fleshy bubbles balloon out from behind her arm. She and the boys stare dumbfounded, pondering why her sub-A-cups have suddenly become a pair of E-cups, minimum.

If the boys were going to lend her a shirt, that's frankly an impossibility at this point.

"I want to hold her again!" says the lead boy.

"Me next!"

Sammie gathers up her new copious endowment in both arms and takes off running, each breast bouncing in and out of her hands with every step. She is followed by the three boys and the laughter of the townsfolk.