And not really thought of a deflating after, though I had an idea about sucy from little witch having mushrooms suck her boobs flat while in a terrarium, but never did it. Basically "Death mushrooms" needed for a potion that required them. The mushrooms jump people and push their roots in to suck out their innards, so sucy putting her boobs in a case so they could only access the boobs, then waiting for them to grow off her boobs contents, the girls only removing em once the boobs are completely flattened.