Yes, I love my mom. In the context of the light novel, the relationship between the characters and their moms can be complex. But generally, moms represent love and care, and that's why they are often loved.
I have mixed feelings. Sometimes the way mothers are portrayed in light novels is endearing and makes me love it, but sometimes it's not so compelling.
I think so. It depends on how the story is told. If it's told in a simple and positive way, it can be great for kids. For adults, even if the story is a bit simplistic, it can still evoke strong emotions as they have more life experiences related to their moms. So generally, it has the potential to be suitable for all ages.