Except for takeoff and landing, and during occasional turbulence, you are permitted to undo your seatbelt and make yourself comfortable, inculidng using the plane's toilet as needed.
I would just tell her, the bathroom's at the end of the plane.
Boys go to the bathroom by standing up and holding their penis.
The liquids and solids go into a holding tank and are pumped out when the plane is on the ground, usually while the plane is refueling.
Bathtub
to use the bathroom, go up to a bush, tap it, and select, "use"
Puppies usually need to "go to the bathroom" right after they wake up and anything from 5 to 30 minutes after they ate.
Go to the nearest bathroom and clean up. If there are no bathrooms around, go home and clean up.
It will be stored in a storage tank. When the plane touches the ground, it will be unloaded and treated. For Airbus A380, the waste will be recycle and treated on-board, others that cannot be recycle will be stored in a tank.
Go to the bathroom Wash your face clean up your face makeup (optional)
They would hold it until the break and they probably go before they go on. Considering all the shows I watch have them in the bathroom warming up their beautiful voices.
go ask the man in the bathroom who is blowing it up,....
because the bathroom is a private place to do it and you can clean up any you make even faster