I'm not sure about leaving her in the garage. If you have a room you could put her in, I think that would be so much better for her and the kittens. Hopefully some of the others who are more experienced with kittens will chime in and give you better advice. She's so pretty, and I'm sure her kittens are going to be adorable!

Did the lady say she would take Sugar once the kittens are weaned and on their own?

Thanks for taking her in and taking care of her when she needs you most.