If MB was in court about Evelyn - she would not be appearing in juvenile court but would be in family court.
How old is MB? She may be appearing in court for prior act before she was 18. Unlike family court, juvenile court deals primarily with minors who have been accused of engaging in criminal behavior but this court only utilizes civil proceedings which means that instead of an actual crime, juveniles can only be charged with delinquent acts.
In general, any individual under the age of 18 may be tried in juvenile court. Periodically, juveniles accused of serious crimes may be tried in adult courts. However, the vast majority of juvenile cases involve petty crimes such as theft, disorderly conduct, drug abuse, and simple assault. Juvenile court is usually less formal than adult criminal court.
Juvenile Court vs. Family Court - What's the Difference? | Law Blog