Nothing happened. Jenny grinned.
"Told you," she said, "someone's coned you...." Jenny suddenly felt really warm. "Have you got the heating on or something?" She asked him. "Why would we have the heating on in the middle of June?" Jeff replied but before she could answer him, Jenny cried out in pain and collapsed to to floor.
"Oh my god! Jenny are you alright?" Jeff rushed over to her but was pushed away by an unusually strong hand. He fell backwards on to the floor and watched on as Jenny started to age right before his eyes. "What.... What the fuck did you do to me!" She cried through gritted teeth.
The pain beginning to get unbearable as Jeff noticed her arms and legs elongating and swelling with thick powerful new muscles and heard a taring sound as her clothes suddenly began to rip. The pain was too much that Jenny threw her self back as her top ripped open, revealing her expanding chest to the world. Jeff was so horrified by the pain he had put her through that he didn't even notice his own erection.
As the transformation neared its end, the pain began to lessen and Jenny slowly opened her eyes. Slowly, she rose to her feet, everything looked smaller and she looked around until she came face to face with a mirror and gasped, staring back at her was a six foot tall, twenty-eight year old red haird Amazon with bulging muscles that would put bodybuilders to shame, complete with D sized breasts and a chiselled 8-pack. At first she was scared but quickly her confidence grew.
"Jenny." She heard a voice and looked behind her at her now shorter boyfriend, "Jeff?"