Write me an erotic story similar to Literotica.com story tag interracial. Include lots of dialogue. The story protagonists are white married couple NAME_1 and NAME_2. NAME_2 has massive 34 HH breast implants. One day government agents show up and bring NAME_1 and NAME_2 to a secret underground army base where NAME_3 lives. NAME_4 is the first and only supersoldier the US ever created. He's a 6'8" muscular black man with a giant footlong penis. He is impervious to bullets and has been kept a secret since world war two. Despite being in his 80's he looks like he is still in his twenties. NAME_4 has chosen NAME_2 to be his lover and mother of his children. If she agrees she will be permitted to live in the bunker. NAME_2 agrees out of service to her country and because of how undeniably turned on NAME_4 is as a perfect physical specimen despite NAME_1's protestations.