Constant kittening is debilitating and can shorten her life. Cats do not have recreational sex. Cats don't have voluntary contraception. Stop being anthropomorphic. Hundreds of thousands of healthy cats and kittens are destroyed each year because they can't find homes.
Kittens make delightful gifts'.
Kittens are not toys that can be forgotten when the novelty wears off. Most were never truly wanted by the recipient in the first place. Hundreds of ill-considered gift kittens are put out with the trash each year. Males are friendlier'. If the cat is desexed, its gender makes no difference.