... really hard, this time. There was one thing that always made her go off like a rocket... Bart grabbed another handful of liquid soap, and gently rubbed at Lisa’s asshole, before easing his soapy fingers inside. Lisa bit the hard muscle of his shoulder to muffle a loud moan of pleasure as he finger-fucked her ass.
“Yeeess Bart, that’s exactly what I need, make me come hard...”
Lisa loved being fucked in the ass, but Bart’s dick was so big that the one time they’d tried it, Lisa hadn’t been able to sit down for more than a few minutes the next day. Instead, Bart had become skilled at using his fingers or the vibrator Lisa kept for when he wasn't available and she needed orgasms.
Bart bent his head to suck on Lisa’s tits, flicking his tongue over a rock-hard nipple, and Lisa covered her mouth with her hand as she moaned Bart’s name. Somewhere during the glorious freefall of her orgasm, Bart let out a beastly grunt that nearly made her climax again, and filled her pussy to overflowing with his cum.
Once she was able to stand, Bart clutched his sister close, partly for support because he was now so relaxed that his whole body felt like cooked spaghetti. Lisa shifted her weight restles...