Write a long and detailed story about a short 160cm white guy and his short 155cm white wife Vlada in a cuckold marriage. The wife loves him, but more in a romantic way, as having been short her whole life, Vlada is fascinated by big black men. She leads a queen of spades lifestyle and keeps him in permanent chastity. She then decides to get preg from a gangbang with 12 bulls (so that they don't know who the father is but the baby is tall) and raise the baby with the cuck. He then continuously begs her to reconsider this decision as it would make him unhappy and the baby's height and skin color would lead to major misunderdtandings with other people. She knew he was right, but the idea was too hot to resist. She apologised to him, but said that she was gonna do it anyway, because she was turned on by it too much. He kept serving her well, licking her pussy till orgasms every day and begging her and finally she agreed to give him a chance for his servitude. Once a week she would unlock him and even have sex with him, letting him cum in her. However, she would always be gangbanged by 12 black men right after this and each one of them would cum in her married cunt. This way she would give him a chance to be the father, so if he fails that's not her fault.