If your dog does go inside again try picking some up on a paper towel, same as pee, soak it up with a paper towel or better yet try to spoon some in a container. Bring the all outside to the spot you want her to use and put her mess in that spot, dogs are very smart at recognizing their own scent. Then take her out (on leash) and bring her to that spot, keep her on leash until she goes. Prepare for a long time outside as huskies are pretty hard to train. No scolding, harsh words or punishments for accident but the minute she does anything outside be ready with the treat immediately so she gets the message. If you don't want to crate her I would keep her in the kitchen as mentioned until she is completely safe to wander around, this could take a few months so I think a crate might be handy if she has to be left. Don't think I would bring her back to that shelter, this dog needs love and understanding. Good luck..