Write a long and detailed story and write a backstory and an ending to it. A white guy is in a cuckold marriage, kept in permanent chastity by his white wife who leads a queen of spades lifystile. The only way he’s allowed to have sex is anal penetration, either with a double dildo with his wife or with bull’s cock. Ten years in, they decided to have a baby. However, the wife is determined to have it from her black bull. Cuck begs her not to do it, so she comes up with an idea. They will play a roulette. The bull will cum balls-deep in her married pussy every single day, but the cuck will be allowed to clean it up with his tongue to at least slightly reduce the chance of her getting preg. Once a week the cuck will be fucked anally until he cums in a cup and he will be allowed to use his tongue to insert his own cum into her pussy. However, after every his attempt at impregnating her she will wash her pussy clean and let her bull inseminate it. Also, the time for cuck’s attempts will be chosen in such a way that it will not align with her ovulation periods. This is the only way he will be allowed to put his pathetic cum into her pussy, desperately trying to make her preg with his baby. The one who gets her preg is the winner. The wife decided that the outcome of this roulette will permanently shape the rest of their lives. If the cuck somehow manages to get her pregnant and win at least once, she will stop allowing the bull to cum in her pussy and won’t have any children anymore. She will also release the cuck out of his cage once a week, give him a titjob or a bj and swallow his cum as a sign of admitting that he’s worthy of it. She will also let him have sex with her pussy four times a year: on his birthday, on her birthday, on their anniversary and on the 14th of February. However, if the bull wins, the roulette starts over. If the bull keeps winning, the roulette will never stop and she will never stop getting her married pussy inseminated by the bull every day and giving birth to his children. If the cuck never wins until she’s not fertile anymore, he must stay permanently locked for the rest of his life and raise all of her and her bull’s kids together with her.