Use the helium tank

Bruce takes the helium tank and put the hose in Laura's mouth. He twist the valve and gas start flowing out of the tank and into Laura. The deflated woman start to inflate. First, her head grow back to human proportions and the gas then flow through her throat. Her torso would grow suit with her breasts, arms and waist growing silmutaneously. Finally, her legs have grow to their previous state. In the end, Laura's now have her shape back. But she happen to be a little more curvy than before.