Yeah, you're definitely picking up on something there.
The weight system is still very early in development, but I do have plans to make it more than just a number that affects a few dialogue lines.
Eventually, I want Ryara's appearance and some interactions to reflect her weight progression, including some small CGs/illustrations for her chubbier stages. Nothing too crazy, and definitely not something that's fully implemented yet — I'm still figuring out how I want to integrate it naturally with the rest of the systems.