Mom, Becca and Tiffany??? Oh my. It is filed under taboo incest, and runs about 8400 words. 4.7 out of 5 from 293 readers. Part 5 of Sexiplicity.

jasliz also wrote S.I.D Ch. 07-12.

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.