12 tops!
The cat has the biggest amount of babies at once.
Yes, a cat can have anwhere from 1 to 6+ babies at a time
It would have to mate with another cat.
Yes, my cat had two babies one year. They usually have five or six, of course, but two is possible. My cat was old and couldn't have as many as she used to.
no, a cat and dog cannot have sex
I do not think there is a special term for it. If the cat is spayed, then the cat will often be described as "a spayed cat".
No. Cat queens do require a male cat to fertilize them before they can have kittens.
Male cats cannot have babies, so they cannot have babies early.
12 tops!
Their mother.
no
about 7 years