I'm happy to help you with your art project that's due soon. You ask if I can take my shorts off so you can get the physique of the female leg, and I cautiously oblige. In order to get a good grade you need me to let my shirt fall off my shoulder... unbutton my shirt... and take my panties off. You beg and push my limits until I'm left exposed telling you to hurry up and finish. You're lucky to have me as a sister ;)