My husband has 4 other kids I didn’t know about? Need some advice?

My husbands ex wife died they had 2 biological children after her ping I come to find out that he legally adopted her 4 other children she had before they got married. I was ok with his two sons living with us not her kids that are not biologically his. I don’t know what to do? I don’t what the other 4 at our home every time I talk to him about it he gets mad and says I better shut up or get out because they are his children always. It would be easier just to let her parents have the 4 other kids because they are taking him to court over it. I don’t know what to do? I really don’t want the other 4 living with us.