Boyfriends Ex wife filed an injunction of harassment against me, also added the kids. What can i do?

My boyfriends's (who is living with me) EX wife filled an injunction of harassment against me, Over two phone calls, and some emails which she participated in as well. She also added the children on there. I want to fight this, at least for the kids to be removed. Is this likley to happen? If he is court ordered to see his kids does that change the circumstances?? It is putting a strain on him being able to see the kids, and affecting my relationship with the kids! Any advice? I just went down and filed to fight it... how likly is it to win? Do i need to bring anything?