Just let your cat have her babies....
If a pregnant cat passes away before it's kittens are born, unless the kittens are removed through cesarean section, then the kittens unfortunately will die as well.
They get in heat and a male cat impregnates her.
I believe the correct term for a pregnant or nursing cat is a 'queen'.
The kittens are kicking inside her.
yes
Bring your cat into your house while she's pregnant and keep her in there until she gives birth and the kittens grow up.
Because they have not gotten spayed yet and have mated with a male cat, who fertilized the female and then they had kittens.
she'll just have baby kittens
no, you can only feed milk to kittens.
No, it is not possible for a spayed cat to have kittens. The spaying procedure removes the cat's entire reproductive system, which includes any unborn kittens if any are present. If the cat is far into her pregnancy, it may be safer (unless a vet says otherwise) to let the kittens be born and then spay the mother as soon as the kittens are weaned. A cat early in pregnancy can be spayed safely.
This varies by breed but with any breed the litters will start to get smaller as the cat becomes older.
Yes. A cat can have kittens from different fathers in the same litter.