Mom making such sounds... Mother Natsumi's lewd moans echoing from the parents' bedroom as they plan to have a child. Learning about this side of Natsumi that I never knew, Keita can't suppress his emotions. It's jealousy towards his father who is thrusting his cock into his mother. Rivalry against an unseen brother who will monopolize his mother's love. Mom is mine. I don't want to give her to anyone... Keita executes a plan to monopolize his mother's love. It was to overwrite the sperm injected into Natsumi's womb with his own...
