Learning a few lessons! Sothis... "Helps."

"Oh! Oh!" Sothis declared, floating over and cupping Petra's breasts from behind. "Let me help by teaching you a few figures of speech! Ones you're going to need to know, going forward!"

Byleth, despite having some idea of where this was going, decided it couldn't hurt TOO much, so settled in to let it happen. "Unh... Oh..." Petra moaned at Sothis's touch. "What figures of speech are these?" she asked.

"First, let's go with a basic one: I'm horny," Sothis lectured.

"You're always horny," Dorothea snorted, Manuela laughing in agreement.

"You know it~!" Sothis giggled.

"Erm... I would say that Sothis doesn't have any horns, but I suspect that is not what you are meaning," Petra crooned, pressing her breasts into Sothis's hands.

"Nope! It means "I want sex!"" Sothis told Petra. "Then there's "blowjob," which means sucking a cock, not being paid to blow on something... Though some men DO have to pay to get a blowjob."

"Oh..." Petra moaned, leaning back against Sothis and letting her continue playing with her breasts. "I see... This lightens me so."

""Enlightens,"" Sothis corrected, before getting back on track with dirtier expressions.

"... shouldn't we be stopping this?" Dorothea asked Manuela, who shrugged.

"Sothis isn't wrong, Petra should learn this stuff now, so we don't have to explain it later," she replied. "Might as well get it out of the way."

With that, the night concluded with Sothis having gone through most of the most common phrases used in sexual contexts.