After waking up from your morning slumber...

...you feel two wonderful mouths pleasuring you. You open your eyes and see that you're still in Mel's room. You look down at your crotch and see Rachel sucking you off and Melanie lapping at your balls.

"Oh shit," you say. "Girls, your mouths feel so good."
Rachel doesn't respond, but Mel hums in agreement.
"What happened?" you ask.
Mel responds, "Well you passed out almost right after you throatpied Rach, so we've been keeping you company since then."
Rachel pulls her mouth off your cock. "Nuh-uh, not me. I was in my room facetiming my friend for an hour. I have better things to do than sit around sucking David's stupid cock all day."
Mel rolls her eyes. "You just have to let everyone know, don't you?"
You smile down at Rachel arrogantly. "And yet you're still here, sucking my cock right now."
"Shut up!" Rachel counters defensively. "I'm not here cus I wanna suck your cock, okay? I'm only here cus I want to drink some cum, and like I said, it's gonna go to waste in Mel's holes anyways. It's not like Mel likes eating cum."
Mel shrugs. "It's true. Not a big fan of the taste. I still take a mean throatpie though."

You lie back and let them work your cock for a while. You feel yourself slowly building to a climax. "Mel, you can stop now. I think this is a great time to have a one-on-one lesson with Rach."
"Sure thing," Mel replies, and she gets off the bed and heads into the shower.
"Alright, sis. We're gonna get in some throatfucking practice, ok? You know, to get you used to it and all."

Your little sister is losing the battle between remaining defiant and wanting your cum, so she just glares at you, saying nothing.
GLURK GLURK GLURK GLURK
You start thrusting up into Rachel's mouth, your cock breaking past her throat barrier. Impressively, she keeps her eyes on you. You really start going at Rachel's face, holding her down on your cock like a fleshlight. Eventually, Rachel can't take much more. She shuts her eyes and starts slapping at your thighs, signalling she needs to come up for air. You ignore her for a solid minute, fucking her throat regardless.

"Huuuuuaaaaaaaahhh~" Rachel gulps down a deep, shakey breath as you finally pull out and give her some mercy. She pants for a minute, then goes, "You're such a fucking dickhead."
"Actually sis, you're fucking a dickhead. My dickhead. With your throat."
Your little sister scowls at you, then reluctantly takes your cock back into her mouth.

"Alright, we're gonna get rougher, Rach. Get ready."
Rachel takes a deep breath into her nostrils and holds it.
GULK GULK GULK GULK are the sounds that emanate from her throat as you repeatedly slam her mouth from the tip to the base of your cock, fucking deeply in her pink gullet.
"Fuck sis, your throat feels so FUCKING good," you say. The cum churns in your balls and you feel ready to explode.

You pull out to her mouth and Rachel puts her tongue on your frenulum, massaging it. You explode in her wet, warm mouth, dumping a massive load into her cute face.
You shoot ropes into your little sister's amazing mouth as she jerks off the base of your cock with her hand. Your entire cock is enveloped in soft, smooth warmth that massages you perfectly as you cum hard.

Rachel focuses hard as she tries to take it all. Her cheeks bulge out like a chipmunk's as you fill her mouth up hard and fast. She gulps as much of it down as possible as more and more cum is unloaded into her mouth and her cheeks bulge out again. You shoot your last ropes into Rachel's mouth.
But it's still too much, and she coughs, splashing cum back onto your cock, balls, and thighs. "Oh shit," you mumble, and you reach onto Mel's nightstand for some tissues.
"Mmm-mmm," she mumbles through her mouth of cum. *gulp. gulp.* "Don't, I'll clean it up with my mouth." And she does, slurping up all the cum that spilled out onto your crotch area.

You smile down at Rachel. She pulls her mouth off and scowls at you. "Don't fucking look at me like that, bro. I'm only doing this 'cus I want to drink some cum, not 'cus I wanna suck your cock or anything."
"Sure you do, sis," you say, still smiling.
"Asshole," she mutters, and she goes back to slurping up the spilled cum.

"Who were you facetiming while I was asleep?" you ask your little sister.
She pulls off your cock, finished. "Amy. Why?"
"What's she up to today?"
"Why? You're not planning on facefucking her or anything, right?"
"Nah, definitely not. Nope."
You have no idea why your sister believes your lie as she responds, "Well good. 'Cus we're heading to the beach in an hour, just the two of us."
"Cool," you say, as you definitely plan on crashing the beach party and facefucking Amy in an hour.

Rachel cleans herself up and heads back to her room. You decide to join Mel who's in the shower, and you throatpie her in the steamy shower. You make out as you two make your way back to the bed, and that ends in a messy anal creampie.
Now even Mel is a little annoyed with you. "Bro, you should've told me you were gonna do that before I hopped in the shower. Now I gotta shower again. Couldn't you have taken this out on Rachel? What happened with the private fuck session you were supposed to have with her?"
"Nah," you say. "Rachel's heading to the beach soon with Amy, and I'm definitely gonna show up and crash the party."
"Suits me," says Mel, and she gets back into the shower to rinse off her ass.