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Big Tits Theory
by Pan
Copyright© 2019 by Pan
Caution: This Incest Sex Story contains strong sexual content, including mt/ft, Ma/ft, Teenagers, Hypnosis, Magic, Mind Control, Heterosexual, Fiction, Incest, Brother, Sister, Anal Sex, Exhibitionism, Masturbation, Oral Sex, Pregnancy, Sex Toys, Tit-Fucking, Voyeurism, Big Breasts, Body Modification, Doctor/Nurse, Public Sex, Teacher/Student, Transformation,
Incest Sex Story: Marty tells his sister about a theory he has - the "Big Tits Theory" - while feeding her body-altering, mind-bending milkshakes.
Author’s note: There will be incest in this tale, but not until chapter 5. If you like, treat the first four chapters as a stand-alone, incest-free story, only opening the rest up if incest is your cup of tea.
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