10. She’s retained her lesson from observing Sadie so Sadie might as well enjoy some too. (+1 forward vs Dempsey)

As Dempsey begins another attempt to take all 8” of you, you reach your climax. Your cock sprays cum into Dempsey’s mouth. She looks for a moment like she wants to spit, but she remembered the fundamental lesson of Sadie’s practical demonstration. She swallows your cum and keeps swallowing as you keep cumming.

Sadie comes up behind her friend and, draping her arms around the other girl’s neck, positions her face next to Dempsey’s. There’s enough for both girls to swallow, and Sadie happily helps out her apprentice.

With a final grunt, your orgasm subsides. The two girls swallow the last drops and look happily at you.

Dempsey looks at her friend, “Thank you Sadie.”

“For what?” the girl looks confused.

“For getting us this extra credit opportunity.” Dempsey smiles at her classmate and you. She’s always been eager to learn new things and this is no exception.