My question involves criminal law for the state of: Arkansas

My brother's ex pressed domestic battery charges on him this past Halloween, after discovering it would put him in jail because she's pregnant. The baby is not his nor her current boyfriend's.

During an argument, she threw herself on his car so that he could not enter it and leave. He pushed her aside, but she continued and wedged herself in the front seat on his lap so he could neither get out of the car or leave while her boyfriend took their (my brother and her) two kids from the back seat. He pushed her off. Of course he and the boyfriend fought...different charges. But nothing that would have had him in jail all weekend, nor facing a felony.

My question is: Isn't this just self-defense with regards to her? He pushed her off his car, his property, pushed her off his lap. He at NO time struck her. She's posted pictures on line of a light bruise on one arm, and possibly one on her breast. My brother is going to speak to an attorney, but he runs his MOUTH so much , sometimes things just get worse. I just want to give him the important facts and issues to discuss. Thanks.