I need to work on withholding my breaths

"I need to work on withholding my breaths, Mistress," you answer.

"Very well, my dear," Rita nods.

She releases you from the stall, and you are taken to the training area at the center of the cargo hold. You are sat down on a metal chair, your legs strapped to the frame, a pool of water in a glass podium in front of you. Then without any warning, Rita puts her hand to the back of your neck, and she pushes your head into the water.

Hold.

You withhold your breathing just fine. Everything seems alright for now.

Hold.

You almost breathe, but in the end somehow you are able to hold out.

Hold.

You withhold your breathing just fine. Everything seems alright for now.

Hold.

You withhold your breathing just fine. Everything seems alright for now.

Hold.

You try to hold, but you breathe. Luckily Rita is quick to notice, and she pulls your head out of the water before anything serious happens.

"You have five minutes to rest. Then we continue," Rita says, firm as ever.

And you spend the entire day practicing as ordered.