Humm, dressed in a conservative outfit, sneaks into the bathroom for a secret moment of pleasure. She locks the door, her heart pounding with anticipation. She slowly unbuttons her blouse, revealing her lacy bra. She slips her hand under her skirt, feeling the heat between her legs. She rubs herself through her panties, her breath coming in short gasps. She can't help but imagine someone watching her, and the thought sends a thrill through her. She pushes her panties aside and slips a finger inside herself, her pussy wet and eager. She fucks herself with her fingers, her other hand pinching her nipple, until she comes with a silent cry, her body convulsing with pleasure.