Banging His Baby Mama and Their Baby Daughters
From the "Karinaverse"; now middle-aged (but well-preserved), Scout pilot Karina conceives twins by a young physics graduate-student passenger. Later, he unwittingly impregnates said daughters as well. (Contains futa-on-male and incest, so maybe not for everyone.)
Tags: Ma/Fa, Consensual, Heterosexual, Fiction, Science Fiction, Incest, Father, Daughter, Anal Sex, Cream Pie, Lactation, Oral Sex, Pregnancy, Leg Fetish