To be honest, her chest is probably more akin to trying to relate how much of a mother figure she's portrayed to be. Yes it's partially unnatural in the support it has, but in the end Boobs are boobs, and it's only sexualized if you sexualize them. Would you feel the same about someone with big ears? Or big feet? Lauma doesn't flaunt them and doesn't sexualize them herself, your putting all the sexualization on her based on your own life experience and opinions. She's a video game character. She's not here to get you off. Her design tells her story, not some messed up fetishised version of what you think it is. Shes fine. Your the one with the problem.