Intent on observing them as she is, Terezi doesn't miss the tiny symbol that Meulin draws on the ground before wiping it away. She stiffens, her head turning a little to check if Fraysong caught that, too. When it doesn't appear that he did, she relaxes just a little.

Terezi fixes a frown on her, showing her own displeasure. She takes up her own bit of chalk and starts to draw along the line. She tries to catch Meulin's attention--just long enough to draw another club on her side, blocked from Fraysong's sight by her body. Then she firmly draws an X through it.