We recently adopted a stray, and she is an absolute love bug with people, so it never dawned on me she'd be so terrified of our other kitties. For almost 3 weeks now she's been in our master bath with food, water, and a litter box. If the bathroom door is open, she won't come out of the bathroom closet. While one of our kitties was aggressive towards her initially, he has calmed down tremendously and (supervised) is quite submissive when just a few feet away. However, she will not stop hissing. Although we make a point to go in and love on her, etc. it breaks my heart for her to be in the bathroom alone most of the time (although honestly she seems perfectly content). How long should we give it until it seems best for us to find her a home with no other cats? Is there anything we can do to increase her confidence? We'd love to keep her if possible. Thank you!