In the dimly lit bedroom, a thick, massive cock tents the sheets, belonging to a strapping young man with a penchant for big, round asses. His sister, a curvy vixen with a plush backside, catches him staring and playfully wiggles her hips, teasing him. He can't resist, and soon, his hands are all over her, squeezing and spreading her cheeks, revealing her tight, pink hole. She gasps as he pushes a thick finger inside, then two, stretching her, preparing her for his monster cock.