He didn’t deny he was a mommy’s boy!! I have a thing for parent-child relationships okey, sshh.
This is based on something I learned a long time ago in highschool about how if you put a person near their mother/caregiver, their heart rate and stuff slows down! Even if it’s just the sound of their voice over phone!
it's not that far fetched, my parents are in their 50's and my grandparents are still around! Since Aang and Katara fell in love young, I wouldn't be surprised if they had children in their 20's. If that was the case, that would make Katara like 75-85 (assuming Tenzin is 45-55).