Creative exercise

A couple of months ago I was having lunch with a friend who does English and Creative Writing and asked him about his course (since I do straight English and was curious). He told me about an exercise they had done in class using characters from a WIP. It was split in three parts: write about something a character is ashamed of, write about two characters discussing this using no more than five words per each dialogue and finally, write about two characters discussing the shameful thing without making it obvious what they are talking about. I decided to have a go at it. It was written in about three minutes over lunch:

"You know your cousin? asked Masika, suddenly striking up conversation.

"Yes..." Farren didn't bother to look up from the course she was plotting on the map.

"He's a bit..."

"Yes?" Farren asked sharply.

"He's not normal," said Masika finally.

"I'm aware," replied Farren.

"Really not normal." Masika wanted to stress this point.

"What do you care?" Farren was getting angry now. She didn't want to hear anyone bad-mouthing her vulnerable little cousin.

"His eyes are weird."

"Not his fault."

"I don't understand him."

"That's on you."

"He eats tree bark."

"Shut up!" Farren had successfully lost her temper. She threw down the map and, with a final scowl of infuriation to Masika,stormed outside to clear her head. Masika heard Farren's heavy footsteps stomping away and wondered if she had crossed a line. It wouldn't be the first time her ignorance had caused conflict.