Looking for a story

The premise was a woman knew her curvy friend had slept with her boyfriend, so she spiked her post workout drink which caused her to expand. I don't remember if it was hourglass or entire body. After she drank it but before she expanded her friend made a remark about people using their big tits and asses to get whatever they wanted. This made her nervous so she started to leave but then began to blow up. The usual ensued and when she reached her limit her friend mocked her saying "the clean up crew will be here tomorrow, try to be a good little piggy and explode or it's two more shakes for you" before leaving.