I had a male disappear for 2+ weeks, he came back looking rough, I think he was after the lost orange tabby to have a little fun. I need to get them(3 outside males, 1 inside male, all my females are spayed 3 outside, 1 inside) neutered but need to get money back together. My wallet disappeared so my neutering money is going to replace my driver's license, child support credit card, boyfriend's ATM card(yes he knew I had it), new Discover card(if my parents will give me one, I only use it for gas, and other essentials that they tell me I can use it for.) That is enough to neuter at least 2 cats(including pain killer shot.)
I want to say last summer I had 4 un spayed cats give us 15 kittens(2 of them had 9 kittens total.) I still have 5, 2 I adopted and brought inside and I have 3 black cats that nobody wanted. All of my cats inside and out have feline leukemia, so if one of my males met your female she would most likely end up with feline leukemia, which is fatal.
I'm glad you are getting her spayed. I hope she comes home soon safe and sound. She might wait until she is through with her heat to some back home.
Taryn