Adult PC Game: Futanari Haha to Josou Shounen to Haha no Shasei Kanri o Suru Manamusume by CHAOS-R Archive

One day you are invited by Misaki.
Misaki says she wants you to accompany her in her experiments. The experiment was to
try out what Misaki usually does for Miki on other people and compare and verify it. We are using a microphone. Also, please note that the recorded production may differ from the main story. Sequel to "Futanari Mother and Tortured Daughter. The futanari mother's evil hand, which has touched her own daughter, extends to her daughter's friend (male)!? This is a science comedy that you can enjoy easily, about a futanari mother who is a sex genie, her daughter who suddenly deals with science, and a guy who will accept anything for her love.

Futanari Haha to Josou Shounen to Haha no Shasei Kanri o Suru Manamusume by CHAOS-R Gameplay Preview