They're going to be taken care of by a big, well-off extended family, as hundreds of generations of children have been prior to the modern invention of the nuclear family (hey, Rayiner, remember all the threads about this?). Then, sometime between 1st and 4th grade, depending on how First Step applies to Holmes, they'll also have their mother at home full time rather than visiting her a couple times a month.
They'll be fine. Lots and lots of kids have it actually hard, because their mom is sent away when they're 5 or 6. Here? No problem. I think she's a sociopath, but her family planning decision makes perfect sense, and the people writing comments about how callous or irresponsible she is are telling on themselves in a particular weird way.