mrsMxyzptlk: Thank you for your comments.
In the comics, Cat had a young son and a terrible ex-husband.
Yes, I had heard about Cat being a mother in the comics, which is why I didn't think it was too far off to get her pregnant.
At some point her son was killed by the Toyman. I know I've read fanfics where she's got a son, but I don't think they were L&C fics.
Thanks for your comments.