Jen was so busy being aroused, disgusted, and disturbed (because she couldn't stop her self from being aroused), that she never noticed when her form slowly started changing back. The main problem being, she was still trapped between her sisters legs, while her sister was having these perverted relations with another girl.
When she finally realized what was happening, the shock that she was changing back, WHERE she was changing back, and worst of all WHO she was changing in front of was just too much. She fainted...
When she regained consciousness, it was to an abrupt slap on the face. She tried to scream out, only to find her mouth filled with some cloth. As she was slowly starting to work out her surroundings, she realized a few things...
A: She was still in the back room.
B: She was tied up.
C: She was naked.
"Good, you're awake... Your sister and I have had a rather fun little chat while you were out. We haven't quite 100% worked out how the hell you appeared between us, but we do have our suspicions. Answer me truthfully, and I might just help you out afterward. If you don't we might just have to try and 'convince' you to be more agreeable. Do you agree to that?"
Jenny nodded, terrified of what she feared they might do.
"Now, since you appeared out of nowhere, and Valerie's panties disappeared as well, I have to assume some sort of magic is involved. Is this correct?"
Jenny grimly nodded her head.
"Hmm, I suspected as much. I've heard rumors of a 'curse.' Was that the cause of your 'transformation'?"
Once again, she nodded her head.
"Now the important question... Will you tell me Who cursed you?"
This question confused Jenny profusely. Why would it matter who cursed her... Unless, she was planning on getting back at him. This idea made Jenny quite happy, so of course she nodded.
Penny undid the gag that she had placed in Jenny's mouth.
"It was Kyle! Can you please untie me now, I'm very uncomfortable here..."
"Oh, Kyle eh? He's a dirty little bastard, very smart, and very sneaky... I'll bet he put a few little extras into your curse."
The color drained from Jenny's face when she heard that.
"I want you to transform into..."