Dillion is studying for her human anatomy class, specifically, she is focusing on the male reproductive system. Maybe you can help her! You don't mind helping her. Isn't that what a step father should do? She questions how real her prop really is and you fully intend to show her. If you cum into a cup, she can take your sample to college. Maybe she'll even get extra credit. Dillion measures your flaccid penis, strictly for the good of science, and she then asks you to get hard so she can measure you fully erect. Perhaps her bouncy titties can give you inspiration. Oh, yes, they certainly do that. Her new measurement is now complete, so she takes off her panties as you continue stroking off. She wears eye glasses and mid-thigh socks and she is excited to show you her ass. Dillion bends over so that you get a good look. After all, she needs your sperm for class! She excitedly holds the sperm receptacle in front of you as she coaches a nice sample out of you.