The Extra Credit Society: The Complete Anthology: The Extra Credit Society, #5.5

Chelsea Baylor and Helen have been best friends all their lives, growing up together, going to school together, going to college together. In their physics class, their lives are changed forever when their sexy professor, Dr. John Warner, believes he catches them cheating. Rather than expel them outright, he offers them the opportunity of a lifetime - to join a sex club, known as "The Extra Credit Society," run by his wife Chantal. Things change even more, as the revelation comes that Chantal is more than she seems.

The Extra Credit Society threatens to tear the two best friends apart, even as they discover new things about themselves, each other, their omnivorous physical desires. This wasn't the education either of them expected from college...

This high-spice erotica anthology includes five sequential stories. All stories are also available as standalones. All intimacy is consensual, no characters are related, and all characters are over eighteen.