Dumb stepsister

You decide that your stepsister just isn't cool enough, so you tease her by leaving a suction dildo on her rocking chair in her bedroom. She is not impressed, and is grossed out by it! She is still a virgin, so she is really freaked out by the realistic dildo, but you manage to persuade her to sit on it and see how it feels. It's not long before she is enjoying the feel of it, and rubbing her clit to her first ever orgasm.