So is it confirmed that she's pregnant? Did you take her to a vet? If she really is pregnant, I'm glad to hear that she'll be getting spayed after the babies are weaned and that you'll be able to keep at least one of her kittens and have other homes lined up for some of the others. I hope that everything will go well.

I do have one question though. Will you also be neutering your male cat? If not why? Even if he didn't like your female cat her going into heat made him want to mate with her since he's not neutered. He could also easily get outside and do the same thing to another female cat in heat or even get into a cat fight with another male cat. For his health and safety please neuter him.