person A: Every time I look through older photos of my children_comma_ I'm taken right back to the time they were that size_comma_ and what we were doing! It's a bittersweet feeling_comma_ for sure.
person B: Oh_comma_ it sure is_comma_ I feel the same way. They grow up so fast! 
person A: Are your kids adults now?
person B: One of them is! I have an 18 year old and a 12 year old.
person A: I have an 18 year old as well -- I don't know about you_comma_ but it's hard to consider her an adult sometimes!