proof that my subconscious flunked math and doesn't know how old I am

I dreamt that my parents and sister and I were impromptu participating in some kind of walking marathon event or foot race that we saw in passing from a car, and there was a guy with a clipboard taking registration and he asked me how old we all were, and I said - exact quote! -

"These are our parents and they're the same age as each other. I must be, uh, maybe about forty five? And this is my sister. She's nine years younger than me so about thirty five."

I am actually forty two. My birthday was in December.

Tristana woke me up after that. I never even tried to tell the guy how old my parents are aside from this Alice-in-Wonderland-ass answer.