They were just rumours. Any girl who did softcore was rumoured to do hardcore back then. Plus, she was born in Ohio and died in California, aged 28. She wasn't an illegal alien, and she never got deported.
There were rumors in the business that she did hardcore, but she was working when any penetration made the film against the law. The place she worked, American Art Enterprises, made a lot of hardcore and stored it in the belief it would eventually be legal. But none of her has turned up. She was arrested for prostitution and deported to Italy. Dammit, she was one undocumented alien we should have kept.