I was not expecting this comment!

I'm in shock! Someone actually made adoption seem shameful!

Here's the story -
I had registered on Pottery Barn Kids recently (I know it's so soon but I could not help myself. I've been waiting three years!) Anyway - I then got a letter and catalog in the mail saying welcome to their wedding registry. The dum-dums screwed up at Pottery Barn. So I went into the store here in providence because I wanted to correct the mistake. I spoke with the woman behind the counter and explained the mishap. She looked us up in the computer and said we were in there and verified our address, etc. Yep, the registry was all set with Pottery Barn Kids. Then she asks a question under her breath - "Is this for adoption?" Actually she whispered the word adoption. Just like that scene in St. Elmos Fire when Wendy takes Billy home for dinner and warns him that her mother whispers words she finds unsuitable. Then the mother goes on to say during dinner "Did you hear about Mrs. Smith? Cancer."
I thought I misunderstood her so I said pardon me. And she did it again. She actually looked around and kind of put her head down. All secret like. WTF?! I was so shocked that all I said back (in my best outside voice) "Yes this is for an adoption!" Then I walked away still in complete shock.
It's been four months since we made the announcement that we were going to adopt our baby and we have had nothing but happy smiles and congratulatory comments. NEVER in a million years did I ever expect to be made to feel like it was shameful. Yes, I expected the silly comments about getting pregnant now that we are adopting and all of that but never shamefulness.
I'm not good at thinking on my feet so I did not have a snappy comment to throw back at this idiot of a sales girl who was by the way younger than me! I still can't really think of anything because it still has me in a state of shock.
What would you say? Have any of you had experience like this? If so what did you do?
Funny what kind of people make up this world.