SERO-360 - 3P with tutor and sister after drugging them? Crazy lust party

The premise involves drugging a teacher with an aphrodisiac, with the 'happy accident' of the sister (or mother) also consuming it. It's a comedic and contrived setup, but it wasn't executed well. Specifically, the way they act like she's naturally losing control after being drugged feels off. If you're going for a 'scheming' plot, it should be more cunning and manipulative.