by Back2egg
It was plainly obvious Sister was hot for her Younger Brother by pointing out his wanking habit,so Sis kept pushing him to make his move,and her roleplaying to entice him further,finally he gave in and they had unbelievable brother and sister sex including spanking her to make it so much better.Now I hope they realize how much they love and need each other and continue their adventure for a long time.
Spoiled by him pulling out he should have cum deep inside her.
Wish I had thought of doing that to the two brat sisters I grew up with. Great story.