Your stepsister Nia wants some hands-on help to learn anatomy for the class she's taking. Will you be a good brother and help her out? NSFW pics in gallery!

Nia wants to try some anatomy experiments, and your body and hers seem like good candidates to experiment on. Who says learning can't be fun?

If you want to get straight to the action, suggest covering the topic of the human reproductive system.

NSFW pics here