You ask her how that helps you

"How does this help me?" You ask. "What the hell are you people up to."

"It's a childcare class." Sarah says, withdrawing a bit due to your sudden anger. "We need to practice how to do those things."

"So you want me to spend the weekend pissing and shitting myself?" you ask.

"I know it's weird but if you do this Mrs Collins will let you pass." She reminds you. "Look. I share an apartment with Tanya. If you like you could stay at our place this weekend and try it out without everyone else around."