Hmm, I agree with Blue Pheonix, I think Tramp and Scamp have a better relasionship.

You don't see much of an interaction between Lady and Scamp but yes, they do have a loving bond with each other. The relationship between Tramp and Scamp, however, is probably stronger as Tramp and Scamp share that wild spirit within them and you see more interaction between them in LATT2. Father and son bonds are usually stronger than Mother and son; same goes for Mother and daughter(s) being stronger than Father and daughter(s) as you can see by the behaviors of Scamp's sisters with Lady (they seem to never leave her side...).

Scamp is Lady's son, I would hardly think so.