In the dim light of a quiet afternoon, siblings find themselves alone and restless. The temptation of the untouched is too great as they lock eyes, the air thick with unspoken desire. The sister, her heart pounding, tentatively reaches out to stroke her brother's hardness through his jeans. He gasps, pushing into her hand, his resolve crumbling. She unzips him, revealing his throbbing cock, and tentatively takes it into her mouth, swirling her tongue around the tip. He groans, his hands tangling in her hair as she sucks him deeper, her eyes locked onto his.