I think I'll try a little bit for now. Sally thought.

Opening the valve ever so slightly, Sally felt the air rush into her mouth. Placing her hand over her stomach, Sally felt her skin stretch out from the pressure. She stopped shortly, when her usually flat stomach was the size of a basketball.

"Amazing." Sally said aloud as she closed the valve. She felt so good, so... full. Now she wanted more. The only question was how to fill up; inflate her belly even more, or try and fill her whole body?