Saki can't dodge the bullet forever, mom comes by and finds she hasn't even given the guy a blowjob she will suffer a thousand years of death or something.
Could just be that there's a dire lack of housewife figures available in RL JP society so they need to turn to fantasy. Last I checked it was very out of vogue in the US for any girl under 20 to learn how to cook beyond microwavable food because career/double income is #1
For some reason I just love the whole house wife succubus concept, it just makes sense logically and practically since a healthy mind and body would in turn lead to a healthy libido and semen production.