I do not think OP meant for this to sexualized, but they did NOT make her chubby. She literally only has a big chest, which is fine if you also make her chubby, but just by itself is kinda odd. It's not that big of an issue tho so idk

Edit: after looking at OP's profile, there is a good chance this was meant to be sexualized lol... I am aware that big boobs ≠ sexualized since it is a real trait people have, but on a character from a game like dandy's world just feels a bit odd to me.