The cuckold wife steals time with her husband... It is filed under taboo incest, and runs about 7100 words. 2.9 out of 5 from 13 readers. Part 11 of Cuckolded by Her Mother.

AmethystMare also wrote Possessed by the Succubus Pt. 01, Punished by His Mistress and A Lustful Invitation, and 3 more.

Others under taboo incest Older Sister's Embrace, My Lingerie-Loving Sister Moves In and 2 Moms, 2 Sons... Ch. 5, and 9 more.

Or keep going.