It was all Jon could do to hold up Sarah's breasts as she exercised. He soon became covered in her sweat. It wasn't much of a party for Karen either. She could feel sweat on her face, which was really Sarah's sweat on her ass cheeks. Sarah's shorts and panties pressed on Karen's face, trapping the heat and stench against her. She was miserable.
Finally, Jon was peeled off Sarah as she entered the locker room. He was stuffed into a gym bag with Sarah's other sweaty clothes.
Karen's face suddenly felt squished, and she realized Sarah was sitting down somewhere. In reality, she was driving home. When she got home, she undressed and got in the shower, changing Jon into a fresh, clean towel. As she showered, Sarah absentmindedly poked her finger in and out of her sphincter. To Karen, it felt like she was putting her finger inside Karen's mouth. She tasted soap and shit.
When Sarah stopped showering, she rubbed Jon the towel all across her body. Then she sat on the toilet. Karen felt a pressure rise in her throat, until her lips suddenly and involuntarily relaxed. A massive turd oozed out of Karen's mouth, who felt like she was puking. Another few turds followed, then Karen's lips clenched tight again. She felt Sarah wipe her face and lips a couple times with toilet paper, then heard a flush. She was having a nightmare.