What a cute kitty you got there.

It's just used to being outside because it's been probably outside all its life. The cat is just shocked that it's a new environment, a new smell. Give it a few days to rub its face and leave its scent around, and she'll warm right up to you.

When my bro first got his cat, which was a wildcat, huge cats too, it hid underneath his bed for 4 days until he finally came out.

What's nice is that you have afemale kitty. They tend to be less aggressive than the male ones.

Keep her, take care of her, and she'll warm up. Let her go outside though. She'll go stir crazy staying inside all the time, plus you said she kept coming back, and now that's she's been in your house, she'll come back home to eat and stuff.

My first cat was a stray cat that we found when I was 6. It wouldn't leave our back door and kept crying, so we took it in. When she got used to being inside the house, we let her run loose and she would just come back to eat. She'd stay out all night, and all day. My dad used to call her a slut because she'd stay out all night. As a joke of course.