Hidden behind the closed door of the cramped attic, the siblings succumb to their forbidden desires. The girl, her heart pounding with excitement and fear, reaches out tentatively, her small hand wrapping around her brother's hard cock. She strokes him softly, feeling him throb in her hand. He's thick, so much bigger than she expected, and she can't help but lick her lips in anticipation. She leans in, her breath hot on his cock, before taking him into her mouth. She's inexperienced, but eager to learn, her tongue exploring him as she tries to take him deeper. The room fills with the sound of her wet, sloppy blows, a testament to her growing skill and their taboo passion.