Write a long and detailed story and write a backstory 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, hoping that she wouldn’t get pregnant from the bull. The cuck will be fucked anally until he cums in a cup once in two weeks and he will be allowed to use his tongue to insert his own cum into her pussy. 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 now 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 wins three times in a row, the cuck will no longer be allowed to put his cum in her pussy and she will never stop getting her married pussy inseminated by the bull every day and giving birth to his children, while the cuck is permanently locked for the rest of his life. Also, he must raise all the bull’s kids together with her, while the bull takes no part in their children’s lives. Lisa was very young and fertile.Let’s say the bull’s sperm is high quality and John’s sperm is low quality. Let’s say Lisa has a 28-day cycle and John gets to insert his semen on days 7 and 21. Let’s say her ovulation period is from day 13 to day 15. Lisa’s 20, she’s healthy and has no fertility issues. Lisa ovulates regularly. John’s semen quality is low in every possible way. The bull’s is high in every possible way. Bull was allowed to deposit his semen balls-deep in Lisa’s pussy. John was only allowed to insert it with his tongue, as far as it could reach. Lisa washes her vagina clean every time after John inserts his semen, she doesn’t do this with bull’s semen. The presence of the bull’s high quality cum on Lisa’s vaginal walls decreases John’s chances. By the rules, this will continue until Lisa gets pregnant, so let’s say her chance of pregnancy is 100%. So their chances must approximately sum up to 100%. Give an approximate chance in percentage of John and bull winning, even if it is not completely correct.