Mai says nothing

No, Mai couldn't tell a girl, she had just met, that she had diarrhea and needed to shit urgently. That was very embarrassing and she preferred to spare herself the embarrassment.

She tried to stay calm and as natural as possible to prevent Wendy from noticing.

Wendy was talking all the way, but Mai barely paid attention. Too focused on keeping her anus closed to listen her.

—Mai, we arrived the street.

Those words were like music to Mai's ears. Her house was a block and a half away, so if she hurried, she would arrive before making a mess of her panties.

However, when he took a step, a very strong and wet fart came out of his interior. She saw Wendy turn to look at her, looking surprised.

—Mai, did you fart?

—No... I...

Before Mai could lie to Wendy, another fart escaped her ass. However, that one was wetter than the previous one. And Mai could swear she felt something wet and hot between her buttocks.

—Mai, do you need to shit?