Movie description: "My Sister's Test". Abigail Mac has a favor to ask her step-brother Seth Gamble. After all, she is his favorite step-sister. His ONLY step-sister, Seth corrects her. Abigail's been working so hard on a massage course she has been taking and has a huge test coming up. Can Seth help? She has no one else and it won't take long. Seth agrees to help out his sis, but there's a catch! Something that Abigail can't tell Seth about, something she can only show him. She takes Seth to the bathroom and lays it on him: before the massage, they have to get in the shower first! Seth is a little weirded out. It is his sister, after all. But Abigail quickly points out that she is his STEP-sister and that it's totally professional. Besides, they were naked in the bath together when they were little, it's the same thing! Nagging him that she's going to fail the class if he doesn't do it, she finally convinces him to get into the shower. Seth is still a little shy, but hops in. Abigail begins to wash Seth and explains exactly what a NURU massage is, saying that it's very hands on, something that Seth is about to find out for himself. Soaping up his naked body, Abigail compliments him on his muscles, noticing that he's a real man now. Abigail is sure he hooks up with a lot of girls in college, and remarks that he's definitely seen naked girls before, so it's not so weird to see her now, right? Seth tells her there have been a few. Things are getting hotter as Abigail asks him about how he likes to fuck girls. She notices that Seth is getting hard, and likes what she sees. Getting down on her knees, she tells him that she needs to make sure she gets EVERY part of his body. She slips her hands around Seth's cock. She does need to make sure it's nice and soapy after all. As she strokes his hard cock, Abigail remarks that his dick has gotten much bigger. She slides her hands up and down his hard dick as she asks him about his sex life. Eventually Seth is nice and clean, Abigail starts the massage portion, spreading oil all over herself and Seth. As she begins body sliding, things heat up even more, and before long, Sarah notices that there is one more area on Seth's body that's still tense, one part that needs special attention, a place only a deep tissue massage will help. Abigail is determined to pass her test, but is there such a thing as studying TOO hard?