Sarah had her little brother bent over the edge of the bed the second their parents left for the weekend. At twenty-four she knew exactly what she wanted, and at twenty Mike was old enough to take it.
She yanked his jeans down hard, exposing his ass, and dropped to her knees without a word.
"Fuck, Sarah, what the hell—" he started, but she cut him off by spreading his cheeks and dragging her tongue straight across his asshole.
"Shut up and let your big sister eat this hole," she growled, voice low and filthy. Her tongue pressed flat and wet, licking long, slow stripes from his balls up over his tight ring. She spat on it, watched the spit drip, then dove back in, circling and pushing the tip inside.
Mike groaned and pushed back. Sarah laughed against his skin, the sound dirty and satisfied. "Knew you'd like it, you filthy little fuck. Been thinking about tonguing your asshole for months." She licked harder, faster, getting it sloppy, saliva running down his crack and over his balls while her hand reached under to stroke his cock.
She buried her face deeper, nose pressed against him, tongue fucking in and out of his ass in steady thrusts. Every time he moaned she got rougher, sucking on the rim, biting gently, then soothing it with broad, wet licks. Her free hand spread him wider so she could get her whole mouth on him, slurping loudly.
"Goddamn, your asshole tastes good," she muttered between licks. "Tight little brother hole all for me." She worked two fingers in alongside her tongue, stretching him while she kept licking around them, getting everything dripping wet.
Mike was rock hard and leaking onto the sheets. Sarah didn't stop. She switched to short, rapid flicks right on his hole, then long slow drags again, mixing it up until his legs shook. When she finally pulled back, strings of spit connected her mouth to his ass.
She stood, wiped her chin, and lined her strap-on up. "Gonna fuck this hole I just licked clean," she said, pushing in slow and deep. Mike took it with a broken sound. Sarah fucked him steady, one hand on his hip, the other reaching around to jerk his cock in time with her thrusts.
They came like that—him first, shooting across the bed while she kept pounding and licking the sweat off his back. She followed right after, grinding deep and cursing into his shoulder.
Afterward she pulled out, dropped back down, and gave his used asshole one last slow, tender lick, cleaning up the mess she'd made. "Good boy," she said, patting his ass. "Next time you're licking mine."
