It’s a spray – multiple streams of water and warmer than she expected, but firm and targeted directly between her legs. Hermione yelps and instinctively tries to rise up off her heels to get away from the sensation, but she can’t. Neville must have applied a sticking charm between her calves and the back of her thighs. The simple effectiveness of his setup is immediately apparent. She can’t move away from the stake she’s tied to, can’t close her knees, can’t lever herself up and out of reach. Instead, she lets out a gasp as the intensity of the water increases and narrows, training itself directly on her clit. She gasps loudly and it turns into an involuntary moan.