Never first in my husband's life

Me and my husband have 3 kids together. 1 girl and two boys. My oldest daughter is 16 and she has mini wife syndrome. I've heard of horror stories mainly from step moms about daughters believing they are first in their dads life and acting like little wives. It's why I never wanted a daughter. I love her but she does things to get my husband's attention. He's close with all our kids but he's extremely close with her. He still brushed her hair even though she's 16 and can do it herself. We have her in therapy for depression but I don't think she's depressed. I think she's doing it just to get my husband's attention. On my birthday my husband was supposed to take me out. My daughter ended up having some issues at day camp with people bullying her and she self harmed and my husband took her to the hospital. If she had cut deep enough that she was bleeding out I would completely understand taking her to the hospital. But it wasn't deep enough to actually kill her. I am not trying to sound horrible but as his wife I'm the one who will be with him forever. Our daughter will go off and get married one day. You puts her first. My mom always said a wife comes before anyone. My daughter herself doesn't want kids. Probably because she wants every man in her life to herself. I hate saying this but I am counting down the days until she's 18 and out of my house and I don't have to deal with competing for my husband anymore. He absolutely destroyed me yesterday when I asked if he had to choose between me and her who would he pick. He asked why he would be choosing. I gave a hypothetical that we were both draining and he can only save one. He said he would save her and I should want that to. It hurt me and I snapped and I know I shouldn't have said this but I said "Are you guys fucking or something?" He got angry and said if I genuinely believe that it's gross that I'm sitting here instead of calling the cops if I genuinely thought he was abusing our daughter. I wasn't saying he was abusing her but he threatened that if I ever said something like that again we would be done. Have any women delt with this? Your husband making you second? How did you cope?