Genie

Rarity was in Saddle Arabia when she found a golden lamp while in a cave. She rubbed on it and immediately went into heat for some reason and it hit her hard. The genie said you you have one wish. She yelled I wish my heats would be felt with every year until they no longer happen. The genie granted her wish in his own way. He snapped his fingers and went back into his lamp. Rarity felt a weight in her womb and her heat vanished completely. She looked down when she felt something like a kick in her womb. She looked at her belly and saw it had grown to look like she had swallowed two whole watermelons. She got up with some effort.