Extra Notes:
There's been a little confusion on certain things within siblings that I thought I'd elaborate on. Siblings and the entire Triple Threat series are inspired by Tangled Up in Green by Poetheather1. I highly encourage my followers of this story as it is one hell of a good read. Anyway, it is established within Tangled Up in Green that the device used to impregnate Kim with Shego's genetic material works almost immediately. Under "normal circumstances" you are unable to tell a woman is pregnant for a couple weeks after the fact. But in light of the fact that two women can't conceive a child (yet… just saying that I think the basic concept is EXTREMELY interesting) science can change how the body works.
In the Kim Possible tv show, spirituality is absent but Poetheather1 established in Tangled Up in Green that after they had made sense of their relationship, Kim and Shego expressed an interest in their children growing up with a spiritual upbringing. I thought that worked very well and so I included it. Neither had been exposed to much of anything outside the Judeo-Christian scope so I found it logical that they would be Episcopal, by far the most tolerant of their lifestyle. Having a child can change someone's views and I think this is something I'm going to work more with.