The shopkeeper got her own medicine

The Joannas, annoyed, each grabbed a potion (Head Powder & Age Regress) and threw them in accord. Surprisingly, they got the old bat, knocking her down hard. By the time they realized what they have done, the guilt-ridden Joannas decided to see if the shopkeeper's alright. No sooner did they get closer than they see the old woman was replaced by a beautiful 20-something old redhead wearing the Old Woman's clothing and with two heads on her shoulders. The heads looked at each other, nose to nose, and said "Fantastic." The left shopkeeper said "Well, Maggie, now what?" The two Joannas looked at each other. "Your name is Maggie?" "No," the right Maggie said, "our name is Magdalene, but we go by Maggie for short" "Oh..." The left Joanna replied.