Do you have an attorney?
Remember, if mom is claiming abuse, the burden is on her to prove the abuse...but that means you need to know how to demand she prove that. If you do not have an attorney and cannot get one, I seriously recommend you study (really study) your state and local rules of civil procedure, the rules of evidence, go sit in and watch some family court cases, discovery and its rules and case law.
Remember, if mom is claiming abuse, the burden is on her to prove the abuse...but that means you need to know how to demand she prove that. If you do not have an attorney and cannot get one, I seriously recommend you study (really study) your state and local rules of civil procedure, the rules of evidence, go sit in and watch some family court cases, discovery and its rules and case law.