My father never really wanted to be a parent, so my becoming an adult made our relationship easier. He was absent from my life for many years when I was young. My father has some Aspie traits, so he and I get on when talking about math, science, and computers. Otherwise, little happens.
My mother continues to treat me as a kid or teenager, depending on her mood and needs. She doesn't accept the AS diagnosis, and is convinced that I just need to try harder to build my social skills, develop normal interests, and get into a stable relationship that leads to marriage.
Note: I am in my 40s. Also, parents went their separate ways when I was in 5th grade. I lived with my mother first, then with my father until he threw me out just before I turned 16. I went back to live with my mother, then to college. Even though living on my own is challenging, I can't live with either parent.
Finally, I'm not actually sure what it means to be treated like an adult. Perhaps because I haven't had the experience, or I'm unable to differentiate or otherwise process something involving the experience.