welcome to the site, sorry it is under such a sad time,
what I think Feline Costumier means is that because this is a website geared towards rescue cats that we all read about and see the massive number of kittens and abandoned/unwanted cats that are out there. We all hear about the struggles of the amazing people who dedicate their lives to trying to help the situation and re-home these cats, but they have their own lives and own problems to deal with too and they are all really struggling at the moment.
There are just too many kittens being born and too many cats being dumped whilst at the same time less and less money is being given to the charities that try to solve the situation, if you stay on here and read a few of the rescue threads you will find it really is heartbreaking the amount of cats and kittens who cannot find a home and how many rescues are fit to bursting with beautiful cats who are in desperate need of homes.
It is for this reason nobody on this website would recommend breeding, especially from a queen who could possibly have health problems. (I am not knowledgeable on cat illnesses but would it breeding from her still have risks?)
This is not meant to offend in any way, it is just how a lot of people on here feel