Am I horrible for refusing to take in a foster child if my ex husband dies?

I have 2 children with ex husband. We’ve been divorced for 6 years and he’s remarried. He has 2 more kids with his new wife. <br><br>He has significant health problems and may not live much longer. I am not too upset about this as we have no relationship, but I am worried about the kids. His new wife has 2 children from another relationship that she is in contact with and also has custody of. She is not a good mother from what I can tell and I don’t want my kids to grow up in that environment. <br><br>My ex husband has hinted that he is worried about the future of our children and he thinks it would be best if I take care of all 4 of them together. I work full time as a teacher and I have taken an entire year off for maternity leave with each of my two kids. I can’t do it again for his two. It’s just too much work taking care of a baby, especially if I have 4 and am doing it alone. <br><br>He is urging me to at least take our two kids and leave his two with his wife. I don’t feel right breaking up the two pairs of siblings. <br><br>I have spoken to my mom about this and she said I’m horrible if I don’t take care of all of them. I don’t feel bad about choosing my two children over his though. I feel like I would owe it to him if he were dying from an accident, but he is dying from health problems he has had his whole life. He knew this was going to happen and decided to have more kids despite this. It’s not my problem.