They were lovers, after one another always, both soon discovered that the other had a yandere side to them, and it was even bigger turn on. The two yandere coworkers, turn lovers soon wish to be parents. So they forced adopt you as their child, you were their toddler, and they would just have to make sure you knew it was your job to be completely dependent on them. Sadistic ways used if they had too. They made you a humanoid robotic body and ended the human one you had. You wake inside a crib.