To unlock the "KINSHIP" trophy in Detroit: Become Human, you must choose to spare the Chloe android at the end of the "MEET KAMSKI" chapter. The chapter is very straight-forward and always leads to the binary decision to kill or spare Chloe. If you choose to kill her, you'll get this instead:
Note that sparing the Chloe will earn you significant brownie points with Hank, getting you closer to the following trophy: