Fight with step daughter gone wrong 😭

Okay so my boyfriend soon to be husband has two daughters the youngest who is seven peed on my boyfriend bed when she’s not supposed to be on there . He was pissed Bc it soakoon the mattress so we punished her by taking her technology for the day nothing to harsh . She broke that and went on it. I then dropped my boyfriend off at work and room was supposed to be clean by the time I got back. Oldest has started but the little one did nothing. So o told her now no iPad till Sunday. And she started getting really rude and saying it’s my fault n I’m yelling for no reason. Then I got frustrated and yelled at her ( Is never hit them ) and she started saying I hate her and I’m rude and a lot of hurt things saying I’m not the boss and doesn’t care if I’m an adult. But I’d give my life for them and I love them so much and took care of them since their real mom choose drugs n shit over them so she isn’t in their life. So it really hurt me so I told her dad since she kept talking back and yelling then he got pissed Bc she was being disrespectful and told her when he gets home she’s getting spanked which he really doesn’t do now she insulted me n her sister tried to defend me n I’m really hurt n Sunday e were supposed to have girls day but she’s not coming.