"【Short Story】 I Was Reborn as the Mother of the Target ≪Duke's Son≫"

I was reincarnated into the world of the otome game "Kimi Tomo," which I played only once after being recommended by my best friend. The person I was reincarnated as is Lulush, the mother of the duke's son who is a target of conquest. According to the game's settings, Lulush dies when the duke's son is seven years old, but I don't want to die. Since I have a second chance at life, I'm going to live happily with my adorable son. This is a fluffy setting. https://ncode.syosetu.com/n8784jm/ This is a serialized version with the short story expanded plus what comes after.