notmysis – Step Sis Teaches Anatomy with Hands-On Demonstrations & Forbidden Tension

What starts as an innocent anatomy lesson quickly spirals into something far more intimate in this steamy step-sis scenario. She’s determined to teach you every muscle group—using her body as the ultimate visual aid. Watch as she demonstrates "flexibility exercises" on the desk, moaning when you "accidentally" brush against sensitive areas. The tension builds with every whispered correction ("*That’s* not the deltoid… let me guide you") until textbooks are shoved aside for raw, hands-on learning. Highlights include her biting her lip during "pulse checks," bending over to "explain spinal alignment," and finally riding you bareback while gasping about "practical exams." Filmed with close-ups of gripping hands and sweat-slicked skin for maximum immersion.