"I have an idea mom." Dan spoke up.
"What is it?"
"Let's give her permanent gas and everytime she burps or farts she'll gain weight. She won't die no matter how much she gains. Also she'll gain a new animal body part everytime she passes gas too."
"That's an excellent idea, Dan." His mother then closed her eyes and started chanting in an arcane language. Kat felt her the magic enter her body and she recoiled in fear. After the spell was cast Kat felt a rumbling in her stomach.
BURRRPPPP! A massive belch escaped her lips and she gained 50 pounds all over her body. A pig's tail poked it's way out of her ripped pants.
"Why did you do this to me?" Kat asked, farting loudly.
"You deserve this. You would have done much worse to your brother. Kat now looked like she weighed 300 pounds and she had an udder growing out of her gigantic gut.
"Actually mother, let's change something. We'll take away the weight gain after every gas attack and instead make her slowly gain 400 pounds. But let's keep the animal changes and the permanent gas." Dan's mother nodded and Kat slimmed back down to her lean 118 pounds. She belched and fur started growing all over her body. Then she felt a great hunger.