My boyfriend has never really been a influential fatherly figure for my kids. We've been on and off for about three years. I have two other kids from a previous marriage and my boyfriend and I have a five-month-old daughter together. We have broke up several times because he would not build a solid relationship with my other daughters. While I was pregnant he dropped me and my daughter who is seven picked up a lot of the slack when my daughter was born. She done things that my boyfriend should've done. My daughter somewhat hold grudge towards my boyfriend because she says that he hurt her mommy. This past weekend we went to the beach as a family and my seven-year-old had somewhat of a sassy mouth. It's something that I've been doing with, been trying to get a hold of it. I never disrespect my boyfriend when he tries to tell me what discipline would work on my girls but when we got home Sunday he said that because of the sassy mouth he feels that I am allowing the girls to disrespect him. He called my children two whiny brats, said they ruined his trip, said that they were liars because my daughter said that he pushed her out-of-the-way and he said that he did not. He even went to the extent of saying that my child was such a liar that she was going to possibly tell people that he molested her. He obviously did not he is just saying that if she lied about that she can lie about anything. He just downright talk down on my children and caused  a lot of unnecessary drama. I tried to see it from his point of view and I do to an extent but I think that he took it a little overboard. I broke up with him yesterday because I'm not going to be given an ultimatum. This was the first encounter that my daughters have ever really had a problem with him verbally. Am I being unrealistic?