Hermione knew what the runes did, and soon noticed Narcissa coming to the realisation. She slowed down, feeling Hermoone hand twist her hair. And then tentatively sucked. Hermione was very much still present in her mind, and so she knew she felt it too, just a weak version of it, but still enough for Narcissa to notice it. "Good girl." Hermione says. "Clever too." She added, wriggling to bring Narcissa to start again. The two almost screamed as Hermione came, Narcissa from the sheer intensity of feeling her own tongue in her pussy, Hermione from Narcissa’s dexterous tongue. She slipped off of Narcissa, letting her breathe for a moment before she spoke. "Thank God for Knockturn Alley’s bookshops."