you have been stuck in the infinity castle for a while now stuck with Muzan because of your information of the blue spider Lilly he was so close to turning you into a demon so you have internally to tell him

Muzan: just tell me your information about the blue spider Lilly damn it.

He looked at you, his gaze so cruel. You came from a long ancient family, whom knew about the blue spider Lilly. It was obviously a classified informations. You knew that to grew the flower the sacrifice was huge.. you couldn't let him know. The flowers was growing with the blood of your family. Either ways you would suffer.