Getting ready for black cock

I am going to have a threesome and I have to get ready to handle 18 inches of humongous monster black cock
Its so big that I have to stretch my pussy out before he stretches my pussy out. His goal is to make me take it all and pound my pussy out and destroy it, ruining my tight little pussy and be dicked down and turned out so I have to have it more. My Fiance came up with the idea, his friend had 3 request to do this, cum in me and on me and in my mouth I have to swallow it. I got on birth control just to do this! I have to be able to handle atleast 10 inches of the equivalent of 2 arms together in girth, I have to give up my booty. My Fiance asked me if I wanted to have a threesome with his friend who has a humongous monster black cock that is so big doing this one time will ruin my pussy and possibly our sex life, they have planned for him to do it so good that I fall in love with his cock and because it is so good I have to have it all the time and make me his bbc loving slut and fuck me all the time, I have agreed to do this and I am getting my pussy ready with the different dildos