Mom bod misunderstandings

At my job today, a colleague from another location saw a photo of me when I was 19-20 and asked if it was 'my daughter' 😅
She obviously saw enough of a likeness to me but I was a lot thinner then. But it did make me wonder how old must she think I am? I know for some people being chubby gives them a youthful look but I sometimes feel I could pass for a woman in her 40's.