Yukiko actually squeaks when he keeps pressing the head of the vibrator to her sore, aching clit, the sensation that had been tense before now almost overwhelming. Compared to that, the second finger in her ass is barely noticeable.

"Satoshi," she gasps, gulping down air. "P-please, I'm going to fall if you... if there's too much more!" Indeed, her knees are wobbly. Her voice is somewhere between 'desperate' and 'pleading.'