"Aw fuck!" groaned Erika as she ran off sobbing.
Locked in the bathroom the salve penetrated her clothes, easily passing through her skin into her body. Her immune system was completely powerless to its magic. A lump soon grew inside her panties as her penis grew into a throbbing boner. Male hormones tore through her body as she became Eric.
His thin delicate form started to become strong with developing muscles. His girl clothes started to rip exposing muscle. The sneakers started to creak and then burst. Veins appeared on his arms as they became larger and bigger. Hair sprouted across his body as he ripped off his clothes. Now a nude teenage male he had a throbbing boner that stretched his panties like a pitched tent.
Ripping off Erika's tattered clothes he entered the girls room as an 18 year old male.