Every time I see a premise like this it makes think of two things:
1: It's going to be a "Meringue Story"(soft, fluffy, and sweet), about a (typically) hot single mother and/or lonely housewife with an EXTREMELY childish and naive personality being a parent and learning the ins and outs of child rearing as you'd teach a 7-10 yo about how to handle their baby sibling/cousin. Bonus points if the father is dead, absent, or working 24/7, because no one but pussies care about men supporting their family unless their side characters or something. Like Okusama, but with dog ears... and a kid.
2: Like all wifey/single mother crap, it's NTR doujinbait. Yeah, I'm going there buddy. In this day and age in the industry I am entirely convinced that the only thing this manga will serve as is getting dudes hard over a ymilf, her looks and moe-face being the giant red flag. I wish this type of manga would just have the male audience as the boyfriend/husband's pov, but nope, "IF" he exists he'll be some bland faceless(probably literally) ponce coming and going before every story.
So yeah, not all that enthused about a new monster girl title.