Take her out to lunch.

"How about we go out for lunch." You say. "There's a new Indian place around the corner which I want to try."

"That sounds good." She replies. "I'll be at your place at 11:30."

At 11:55, she rings your doorbell.

"Come on." you tell her. "The booking is for 12."

You lock up your apartment and take the short walk to the restaurant.

There's a lot on the menu that you both want to try so you order a lot of dishes and share them, discussing your favourites and comparing them to similar dishes served at other restaurants.

After you're too full to eat any more you stay at the table talking. After a while, your stomach starts to feel funny. You tell yourself that it's just because you've over-eaten but as you start to feel cramps you realise that the food is disagreeing with you.

"My stomach feeling funny." You ask. "Maybe we should get going."

"Yeah." She agrees. "Mine is too."

You pay for the meal and leave the restaurant. The cramps keep getting worse. You're just outside your apartment when Sarah stops and clutches her stomach. She lets out a loud wet fart followed by a squelching noise. Moments later, the smell leaves no doubt about what just happened.

"Did you just mess your diaper?" You ask.

She nods, blushing deeply. "I need to call Tanya to bring me a clean one."

"You don't carry spare diapers?" you ask.

"I don't change myself. Tanya does it" She explains. "So there's no point carrying them."

There's a pharmacy across the road. You could probably find what she needs over there but you also need to get to the toilet quite urgently yourself.