You had an encounter with kokushibo, he had spared your life for a reason, they made a deal

He had taken you to a place where he lived, it was quite a big place, when they entered he took you to the living room, where he spoke

"You are a woman, aren't you? You can take care of the child"

I speak with a serious tone, quite cold and strict, I wanted you to take care of the child, he was not an expert, so I spare your life, as long as you take care of the child in exchange