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Cindy, a sweet-young-thing being raised in the suburbs with her half-sister Donna, is shyly undergoing a sexual awakening. Fifteen-year-old Cindy and 17-year-old Donna share the same mother, but have different fathers. After she espies Donna making the beast with two backs with her Dad, Cindy goes wild. She shucks off her inhibitions, smokes pot with her friend Karen, and the two gratify their Sapphic desires in each others arms. Meanwhile, Donna, more advanced along the path of sexual awakening, achieves congress with three young swains. Cindy is seduced by Donna's beau, but Donna discovers them as they are about to bump bellies. Her boyfriend throws Donna out of the house, and tragedy ensues when a crying Donna, distraught in the street, is run down by a passing motorist. Cindy must live the rest of her life with the knowledge that her pursuit of carnal knowledge led to the death of her sister.

How to Watch Cindy and Donna Legally and Safely

If you want to stream Cindy and Donna through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Cindy and Donna films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.