Can you go to jail for doing this?

say this man used to physically abuse his wife but stopped because she threatened to call the police on him. But he continues to emotionally abuse her but she i think is too scared to divorce him. they have kids together and their story is just like the "wave of abuse". her husband the abuser isolates her from her relatives and tries to control her. he wiretaps her phone and is crazy jealous even if his kids get too close to their mother and thinks they are plotting againt him. He treats his kids well but keeps them in control and doesn't let them go out that much. His wife and her kids are scared of him for some reason. i think she needs some support from her realtives to divorce him and leave him for good. he has been abusing her for over a decade and doesn't let her or her kids do anything. he even takes the money she earns for himself(veeeery cheap). he does some illegal things that i know of too. he is a very bad man and he isolates her from EVERYONE. As a close relative what can i do to help her????? i want her to be happy and free from that bastard. please help. we all tried encouraging her but shes too far away and i think she needs her family next to her to feel stronger.