My mom hates my boyfriend?

[Aly]

Its a long distance relationship and his cousin is a pervert so he brought a movie for all three of us to watch over skype me and my boyfriend did not know that it was a porn movie though.. His cousin didn't tell us or warn us and my mom found out and said 'he knew what it is (my boyfriend but he didn't) he felt bad and everytime I say his name my mom cusses and says 'do I need to check your facebook to see what you do and who the fuck you talk to?' but I wanna keep my boyfriend but once my mom is mad NOTHING makes her stop till that person is dead.. its annoying every boyfriend I have she hates or will grow to hate I mean this boyfriend I have is the only one I actually love and isn't a total asshole he's trying everything to get on her good side but nothing will work.. I don't wanna lose him please help.