I am a Lady

When I got on the elevator, there was a little girl with her parents. The little girl stared at me, then whispered, "Mommy, there's a lady."  The mother didn't respond.  I kept staring at the doors.  The little girl, thinking her mother especially stupid, whispered again, "Mommy.  There's a lady in the elevator with us."   Silence.  "Mommy! There's a ...." 

"Yes, dear. That's a lady." 

Floor 3.  Floor 2.

"Thank you for calling me a lady!"  Her parents laughed, but the little girl looked as shocked as if I were a pangolin telling David Attenborough, "You're dang right I'm a mammal!"