"I don't want them." Well woman, maybe you should have thought more carefully about that before you made bang bang with their father. And where exactly is that sperm donor? You could have looked for help from your family, you could have dropped the kids off at a police or fire station, but you couldn't even be bothered to do that. So you stuck a KNIFE into the head of a tiny tender infant and killed his sister, too. I cannot even wrap my head around putting a knife into a baby, let alone two of them.
You should be thrown into a volcano, the gateway to hell.