The Chemistry Lesson

Misty and her mother were beautiful, and though Shauna loved hanging with them, she harbored a secret jealousy of them, Misty was popular, a cheerleader and always had boyfriends chasing after her. She got her good looks from her divorced mother Alexa, who when younger was Las Vegas showgirl. Even in her late thirties Shauna wished she was as beautiful as Alexa. Shauna realized that she and Misty had been friends since kindergarten and the two of them were more like sisters, but she sensed an edge in Alexa's attitude when they were together and was concerned, she was having some less than motherly feelings for Alexa.
Shauna, though a nerd through and through, was smart enough to reason out what Alexa's feelings for her might be. She decided to test the theory. Her opportunity came the day she was supposed to stop at Misty's to help with her chemistry lesson and prepare for an important mid-term test. Misty, however, had gone to the library to study with another friend and that left Shauna alone with the voluptuous Alexa.
The two of them were relaxed around each other so when Alexa said she had a household chore to take care of, Shauna quickly told her she'd just rest a bit on the couch until she was finished. When Shauna awoke from her short nap, she realized her world was about to change forever, and her theory was correct.