I must agree with PiddyPats - kittens are killed every day. I have been rescuing for five years and many owners come into unforseen problems and their cats go to shelters, many do not get adopted and are killed. Although your kitty is certainly cute and you love her, she is a domestic cat, a brown mackerel tabby which is quite ordinary and breeding her would be a shame, even if you keep every kitten. When there is a genetic defect, "breeding" it into a line can only create heartache for you and the kittens. Also, for every domestic kitten you breed, one dies in a shelter because a home is taken away. There are too many domestics as is.
While I know you can say I am living a double standard because I breed Abysinnians, all my domestics are spayed and nuetered because of the overpopulation of domestic cats in general. It is not the ferals that are dying in the kill shelters, because they don't take in ferals - they kill people's pets. The ferals die from exposure, violence, lack of food and disease - and ferals come from cats who were once people's pets and thrown away.