There’s an undeniable truth that we as humans cannot live for a long period of time on Mars or the Moon due to the radiation. I worked this into my story by bringing my characters back to Earth. Here you learn their backgrounds, their families, and how our attitudes will never change in the future. https://www.amazon.com/gp/product/B01E9N6FPW
When Alice and Mike return to Earth from Mars, she receives a disturbing communique from her cousin. Mike presents her with a surprise as her cat finds his own mischief. When Alice and Mike announce their big occasion, someone in the family demands retribution for a past event.