Pregnant Katie Cummings, her belly heavy with child, finds solace in her brother's comforting presence. As they lounge together, her brother's gaze lingers on her swelling breasts, straining against her shirt. Katie, noticing his fascination, teasingly plays with her nipples, feeling them harden. Her brother's breath hitches as he watches, his own body responding. Katie, emboldened, straddles him, grinding against his growing bulge. He tentatively touches her breasts, marveling at their weight and softness. Their make-out session intensifies, but Katie, unsure of how far to go, pulls away, leaving her brother panting and eager for more.