Sorry, one last thing I wanted to add. I'm with you on not wanting to have a dog potty indoors, I totally understand that since that's how I thought at first. Now I see it as an asset to have a dog "dual" potty trained. What if it rains? Kaji doesn't care and will run and play and potty in the rain, but not all dogs are ok with that. My roomies dog would pee and poo on the carpet because it happened to be raining outside. So really, dual potty trained has it's advantages, and once your baby understands potty on piddle pads, and potty outside are ok, you can focus on just one. It will be really easy for you since you're a stay at home mom. Keep your schedule consistent and she will eventually understand what it is you want her to do.
And, don't listen to people who tell you to take her back. They're pretty much telling you "she's broken, return her for a new one." Obviously, that's not how this works. Yorkies are living breathing creatures. I was told to return Kaji because one of the vets I visited told he was "broken." Like he was a faulty belt or something.