well it doesn't have a loot of grinding lol i don't know if you ever played grindy game but this ain't one of them you just progress the story and stuff happens
also here is the description
Sarah’s House is a 3D story-driven game about the challenges and unexpected moments of starting fresh in a new city. You play as a young man adjusting to life under one roof with your mother’s close friend, her husband, and her two daughters
you see how it says story driven game not sex simulator XD
i don't know what did you expect to just load in and fuck after 2 days the game takes few hours max right now to finish it i wouldn't call it grind
i played a ton of 18+ games and this one is very good it is still early acces