I've Been Pet Sitting For 8 Months And They Want Their Cat Back. (indiana)

So 6 months ago a friend called me asking if I could watch her cat (which she had owned at that point for maybe 3 months), for her for 2 weeks while she stayed with her parents looking for a new place. I agreed to take the cat, and met up with her. She gave me the cat in a cardboard carrier (the same one she took her home from the shelter in), with a $5 bag of food and litter but no litter box or any other accessories/toys. Long story short, 2 weeks has turned into 6 months with no compensation and little to no contact from this friend. On Sunday, I texted her asking if she was actually going to take her cat back at some point or if this cat was staying with me long term. She proceeded to tell me she wants the cat back after the holidays. I understand that it's technically her cat, but it's also lived in my home at this point longer than it's even known her for. I've paid for everything, a new litter box, litter, food, toys, you name it. This friend also has two small children who really don't know or understand how to properly handle and play with a cat and I just feel like giving this cat back is a bad idea. Do I have any legal standing?