A curious gay friend of the sister visits, his eyes wandering to her brother's bulge. The brother, open-minded and horny, encourages the exploration. The friend tentatively takes his cock out, stroking it while the brother watches, hard himself. The brother leans in, taking the friend's dick into his mouth, swirling his tongue around the head. The friend moans, pushing deeper. The brother pulls back, saying, 'Your turn,' guiding the friend's hand to his own throbbing cock. The friend licks his lips, taking the brother's dick into his mouth, sucking eagerly.