Madison worships your cock, you don't come, and you don't get into trouble

Your youngest sister Madison is on her knees in front of you. She licks the tip of your cock, then licks her lips. "You taste good!" she says. She smiles and tosses her long red hair. You can feel the warmth of her skin, still hot from her run, radiating on yours, and your nose tickles pleasantly at the scent of Madison's sweat.

"Right on, Maddie," your middle sister Taylor says. "Now do it like you mean it."

"Um..." Madison says. She looks up at your face, the spell momentarily broken.

"It's okay, Madison," you say. "Give it a try, you'll like it."

Her eyes focus on your cock again. Mesmerized, she leans forward and takes in the head of your cock, sucking on it like a blow-pop. "Mmmmh," she sighs, closing her eyes.

Now that she has her mouth on you, you relax and she sinks into the sensations of sucking and licking you. She can't take you very far into her mouth, but the more she sucks, the more she enjoys it. Happy little noises come from Maddie as she loves up on your cock with her lips and tongue. You wouldn't say she's a natural, but it really turns you on to have your no-longer-little sister Maddie grooving out on your cock.

You glance at Taylor. She's staring, mouth a little open, at Madison as she gives your cock her enthusiastic but sloppy best efforts. "Maddie, whoa girl," she whispers, "you're really getting into this."

"Mmmmh, mmmmh," Madison sighs, her mouth full. She reaches one hand down between her legs. You hear her fingers stroking her wet folds and scent her arousal. "Mmmmmmmhh."

Your cock swells and throbs, and your sighs join Madison's. You close your eyes and lean back against the wall. "Ahhh," you say. Taylor's blowjob was hotter, harder, and deeper, but Madison's sheer enjoyment of your cock is sweet, and she seems to be getting better at it as she goes.

Finally Madison comes up for air and takes a deep breath through her mouth. "Oh wow, Tom," she says, looking up at you. "I never thought, I mean, I don't know... I thought it was crazy but it was good. Really good."

"Hah ha ha," Taylor says. "Didn't I say you'd love it?"

Madison laughs. "Yeah, you did," she says. She stands up and kisses Taylor. "Thanks, sis."

"Ew, you're all sweaty," Taylor says.

"Ha ha, like you aren't when you hug me good night after your shifts," Madison says. "I did come in here for a shower." Her eyes turn to you. "God, Tom, I don't believe it, you're home a day and..." she looks down at the floor, then back up. "And. Yeah." Her nipples are poking out from her bare breasts like a couple of pink raspberry bullets.