Note: Thank you @Ironize97 for the positive review.
_
"It is larger than last time. Am I doing good?... or should I use my mouth?" Sheela wrote on the note book and showed it to Das. With a slight grin, Das wrote a reply on his notes and showed it to her.
"You are doing super good. How can you use mouth now?... teacher is looking at us." Das asked with a smiley symbol at the end.
As a reply to Das question, Sheela intentionally dropped her pen towards Das side and she bent down to pick up the pen. In the process of reaching her pen, she opened her mouth wildly and directly swallowed the stick deep inside her mouth.
She moved her head like a jerking machine and immediately got up with a pen in her hand. Das experienced a roller coaster ride in that short moment. He gripped her thighs tightly as a reaction to her sweet water mouth sucking.