When it rains it poors!! So sorry the babies are sick. I have to agree with the others that while it's awful for them to be sick at least that can be treated. What exactly is that is wrong with Phoebe? I'm kind of confused about the spay and swollen uterus thing.
Anyway...prayers are on the way for a quick recoveries and that your home will be pee free very soon!
Bless you for putting up with so much but still loving and caring for your babies.