I was thinking the exact same thing.
Even though I am adopted, I am 310% sure, and then some, that my mom is my real mom.
People have asked me all my life, "But what about your 'REAL' parents?" And I'm thinking, my parents couldn't be more real even if they HAD conceived and birthed me.
I always said that even if by some 1 in a 10 billion chance my biological parents did find me someday, I would find another polite but respectful way to address them, because to me personally, "Mom" and "Dad" are beloved titles reserved only for the people who raised me through every trial and tantrum.