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If your sister is an attorney and missed a court appearance, that is the basis for a complaint to the MD bar for violation of the rules of professional conduct. It is also a potential ground to sue her for malpractice for failure to appear and the damage it caused you.
So, you have grounds to seek to file a complaint against her with the MD bar and also to sue her for the damages her failure to properly represent you caused. You also need to obtain another attorney who can seek to go to court, since it is obvious this judge is not happy with your sister's failure to appear or reply to court pleadings, and seek to argue that the orders need to be modified based on your prior attorney's negligence, which (unlike in a criminal case) is something that would then be at the discretion of the judge.