attack on titan crossover fanfiction

My best friend and I signed up for the Dual Marriage System so the cancer wouldn't kill me. She and I managed to steal the hearts of the Hopkin brothers. Naturally, we became in-laws. Seven years later, my husband's son told me I was dull and useless. Meanwhile, my best friend's husband slammed her behind bars for the sake of his old flame. When she was released, the last thing she told me was, "Live on." Then, she rushed into the oncoming traffic and was crushed into a pulp by a speeding truck.