I'm not very familiar with a specific 'like your mom light novel'. It could be a rather unique or niche light novel. Maybe it has a story that revolves around a relationship with a mother - like figure, either in a heartwarming family - centered plot or perhaps a more complex emotional exploration. But without more context, it's hard to say precisely what it's about.
Finding the 'like your mom light novel' can be a bit of a challenge. If it's a relatively new or indie - published light novel, it might not be as widely available. You could try searching for it on e - book platforms such as Amazon Kindle or Kobo. Another option is to look for it in light novel fan communities. People there might be able to point you in the right direction, whether it's a physical copy in a specialty store or an online source.
I don't have a strong liking for it. The available formats for download don't always meet my expectations, and the download speed can be quite slow at times.