Olivia is laying on the sofa tummy down, she enjoys a relaxing weekend; Lara and Eeona come in and ask her if she can help them with a school project: checking reactions and sensitivity level on feet during tickling. Olivia can’t say no to her step-sisters and Lara sits on her legs, while Eeona sits on the floor. They start to tickle her soles with her fingers, checking different areas and recording on their journal how much it tickles from 1 to 10. This seems so intimate to all of them, that since the first second it becomes more than just a school project. The arousing atmosphere covered the room and girls weren’t able to resist. Eeona start kissing Lara, caresses her breasts under the shirt. Olivia figures out they are not doing the project, when Eeona by accident start to lick Olivia's foot, and Lara confess Olivia that she has a tickling fetish. They can’t leave he alone, so Olivia asks her if she wants to tickle her but in exchange they have to be tickled too. They agree. Next, Eeona is naked on the bed tied up spread eagle. Olivia and Lara caress her breast and nipples, tickling and sensually stimulating her whole body. Everything should be kissed, licked and tickled. To make everything spicier, the vibe is pressed on her clit, making her moan and get even more pleasure. Making her get close to the orgasm just makes her more ticklish! Olivia and Lara move to feet and use not just fingernails, but an electric toothbrush, playing with her sole and each other. Next turn is for Lara. Girls with great pleasure make all the same, to give their step-sister all the wonderful time. At the end Olivia is very horny, masturbating tickling Lara's foot, which make her go crazy, and Olivia have an orgasm hearing Lara begging and laughing. Now Olivia is tied on the bed; still very horny and sensitive, as well as Lara and Eeona. They set a camera, to record all the fun and repeat the treatment all over again. After a several orgasms girls are sitting on the sofa in their underwear; Eeona is watching a tickling video on her phone and ask Olivia how someone can have an orgasm while tickled. So, Lara sits behind Eeona wrapping her legs around the body, while Olivia is in front of her slowly tickles her feet, ready to show her how!