Am I missing something here? I'm a few hours in and it seemed like MC just called Marian his cousin but all the default relationships are roommate, landlady, etc. Maybe is a mistranslation? This is the first I'm hearing of familial relations as far as i recall... if these characters were related wouldn't the default relationship titles reflect that?
It's called My Family Farm because the girls can get pregnant, no?
Edit: The Machina Ring uses "Friend" as her title by default so I'm extra confused now