So are you guys adopting? Are they talking to your son's dad? (And FWIW, *I* also have really long legs and really big feet; he's in good company. )
For us, the SW for the homestudies are all wanting to talk to my stepdaughter's mom to see if she approves of me and my husband as parents... which she does NOT. It's one of those situations where we've been married two years and she still hasn't adjusted/accepted the reality.
No flaming - my SD takes her with a grain of salt wherever her dad and I are concerned, and likely would not grow up to be an ax murderer on the sole basis of having a younger sibling.