Stepson's big cock energizes athletic stepmom's vagina

Madison, a sporty stepmom, wants her stepson to help her train... her intimate muscles. Ha, it sounds like incest, but there's nothing wrong with that... you just need to help stretch the muscles of the buttocks and legs, gradually moving from the bottom to the top. Usually, her husband helps her with this, but now he's very busy, so Johnny takes on the task. The training goes great... so great that his cock becomes rock hard, and Madison decides to use it for its intended purpose.