Well, that took all of five minutes to read. Haha.
Blood Monster by Neil Gaiman is either about a father telling his kids a scary story, or about a blood monster who has entered into the family home and become the mother! Or maybe the father is insinuating his wife is like a blood monster??
But let’s not read too much into it and assume it’s the first option. In which case it sounds pretty much like a typical family scenario if I’m being honest! One without any real start or end, a dad who’s not particular concerned about the consequences of scary stories, and the mum who just wants to have some peace and quiet and will he turn off the light please so she can get her sleep???