How does someone talk to a 4yo bout court matters. I had my SO others 4yo tell me this morning that…

How does someone talk to a 4yo bout court matters. I had my SO others 4yo tell me this morning that her mom is gonna talk to the courts so she no longer has to come out here. Like seriously she's 4 and u pretty much have no say in what the court says. What is she gonna do if at the end of the day she ends up living here permanently cause we r fighting for custody of both his girls. They r no where near in a great environment out there with her and then wants to brainwash the child. It's more then aggravating it makes me so mad. We've got Court today on the custody issue and I hope this finally gets settled it's stressing us out cause we don't know where these kids r gonna end up and his oldest wants to cry because she wants to stay with us. She hates living at her mother's and doesn't want to go back. Sorry had to RANT!!!