Aunt said I looked like her son.

I think he thinks you are about the same age as his son, so he is curious to confirm your specific age, but he didn't expect you to be the same age as his son.

The proprietress may make a living outside all the year round, seldom go home, spend less time with her son, and miss her very much on weekdays. Seeing you reminded her of her son, so she said a few more words to you.