Well, this is quite something.
I've only read the first volume, but this seems pretty interesting and funny so far.
Instead of having the protagonist and the main heroine get together, the protagonist and main heroine are son and mother, which leads to some pretty awkward situations that would be considered good in other stories.
For example, there is a scene where the main character is in the bath with three other girls, on of them being his mom. In normal one guy, multiple girls Light Novel, this would mean the begining of a harem, but not here. Since one of the girls is his mother, for as
much as the guy wants to look, there's no way for him to do so.
The story also explores a unsual concept, the main character relationship with his mother. Depending on how this is taken, it could lead to a pretty interesting story development.
Anyways, I plan to read more of this and hope this review got you interested enough in this Light Novel.
(BTW, for those who are wondering, no, there is no incest in this and it doesn't seem like there will be. Though the mother has a lot of scenes that makes it feel like she's a harem member on a ecchi story)