"Michael was really tired, Mom," Hope said, "I told him he needed release before he could sleep, but he wouldn't do it unless I helped him. You know Michael. He can be very stubborn."

Mary stood there, in a bit of shock. The siblings took her silence as permission and Hope, once again, began riding her brother. She leaned forward, letting her tiny breasts drag over her brother's chest and the two started to move more erratically. Urgently.

"Going to cum!" Michael cried. His sister straightened like she'd been shot. Her whole body trembled and her chest turned red. Then she fell forward and rested her head on Michael's shoulder....