Well, I think a lot of animals just bond with female humans differently than with us males of the same species. I know over the years, all my pets, cats, dogs, and birds seemed more at ease around female Vets, children and houseguests. My wife cared for 39 stray cats once, most of them seemed to know if a man or a woman was approaching. (Hint: If you were a guy, it looked like a cat tornado taking off. Stand clear!)
Your puppy may already know which "little people" are which.
Sounds normal to me, they will probably grow up together and be close friends.
Puppy pictures would nice too. Puppies are cool, just don't tell our cats.