Mom is sexually aroused watching daughter having lesbian sex. It is filed under taboo incest, and runs about 4800 words. 4.1 out of 5 from 52 readers. Part 3 of Slow Hand and a Woman's Touch.

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.