I truly got fed up with my husband

I got so fed up with my husband today. If you guys have been keeping up with my post my husband's 16 year old is living with us because his mom is facing prison time for vehicular manslaughter. My husband walked out on him when he was 7 and his son hates him. He will never do anything he asks. He flips him off and tells him fuck you dad all the time. Me and his son get along okay. He doesn't have an issue with me and my husband wants his son to hate me as much as he hates him or fix their problems for them. Last night things got really out of hand and he told his son to leave so his son tried to and I tried to get everyone to calm down. This was all over his son painting.... This whole thing started because he was mad at his son for painting too many paintings... Well he ended up accidentally crushing his sons hand in the front door. It's not broke. I wrapped it up. His kid was having a panic attack so I was in the bathroom with him. He had fallen when his hand got crushed in the door and got stabbed in the thigh by a nail so I cleaned it and help him strip and get in the bathtub. I also found out his dad leaving isn't the only reason he hates him. His dad moved on his best friend named Roger who was a but and when his dad left, he left Roger there with them and that week Roger started sexually abusing him for 3 years. I told my husband he said he didn't know and through himself another pity party. His kid went to school this morning and now his son is doing the silent treatment. Not talking to his dad a all. Around the time his son was supposed to be home my husband was feeling sorry for himself all day and I kept saying talk to him and he would rather give himself a pity party so finally I got fed up and said to stop the fucking pity party and talk to your son. I'm sick of it and he needs to be an adult and go talk to him. He pulls the whole he doesn't want to talk to me and I say since his son has been here he's made everything about him and he's not the victim. You left your kid and your kid got abused by a man you brought into the house and left there. Then he got hurt yesterday. He said it was an accident and I said I understand that but the fight it's self was his fault. You literally picked a fight with him for painting too much. I told him he found out his son was sexually abused for3 years and instead of running to talk and apologize he through himself a pity party. No wonder he hates you! Since he's been here it's about how you feel! You're not trying to actually fix anything so if you're just gonna sit here and pout about your life you're showing the type of man you are. Stop acting like the damn victim!

He hasn't said much to me since then... His kid came home and again silent treatment. I helped him with someone homework but that's pretty much it.my husband said he's having a talk with him tomorrow... So fingers crossed. I'm hoping I got through to him.

@Ashley the thing with his hand was his son was trying to leave I went after him to tell him to calm down and let's talk and his son was saying he can take care of himself. His had his hand on the door frame. My husband came up and said he told him to get out and slammed the door. When he realized he got his hand he opened it and tried to say he was so sorry when me and his son wherr in the bathroom but I told him he couldn't be in here because, his kid was upset and his presents was making it worse.

Also I'm not a legal parent. I couldn't just get custody of him and leave. Step parents don't have rights unless there's an adoption