Congratulation s! Sounds like you have a real sweetie on your hands. Fostering, in my opinion, is one of the greatest things a person can do to help animals. I can't let go of them and tend to take in ones that aren't wanted. I have to limit myself to transports, overnight stays and running rescue events and pet fairs. It takes at least a month, if not 6 or more to really see a rescued dogs personality emerge. They have to feel secure and confident that they are in your home to stay. A shy, timid dog can easily turn into the dominant, alpha dog, running the entire household ragged. We are still watching ChiChi's personality evolve and we have had her since May. I have not dealt with wolf hybrids, but think they are beautiful animals. I have heard that they can be a handful, but then i appreciate that trait in my dogs, so I envy you the experience. Just remember to maintain your position in the pack and reinforce it if need be, with the new addition. You should do just fine as long as you are aware of what is going on and stay on top of the situation. Good luck.
Kathy