Yes. You may use the soap.

"Thank you, Master!" they say in shared relief.

You hand them both a bar of soap each.

"YOU HAVE TWO MINUTES." you say.

They stare at you stunned.

"BETTER NOT WASTE TIME. MY COCK GROWS IMPATIENT!"

Both frantically get to work. One of the girls begins rubbing the bar of soap up and down the crack of her ass. The other lathers the bar of soap within her hands occasionally working her slick fingers into her asshole. Both cringe at the brutal self treatment nervously glancing between each other and your massive cock. You can practically see their little minds doing the calculation as the desperately work as much soap deep into their ass.

"TIMES DONE!"

The jump at your words, "Master you said we have two minutes!"

"HANDS AGAINST THE WALL. BE THANKFUL I GAVE YOU ANY TIME AT ALL.

"Yes, Master!" they say in unison pressing their hands back against the wall and spreading their legs.

SLAP! SLAP!

"ASSES OUT," you command giving both of their behinds a firm slap.

Both of them arch their backs and present their soapy assholes.

"WHO IS BRAVE ENOUGH TO GO FIRST?"

"Me!" they both shout together.

You chuckle grabbing the one on the left by her pigtails with one hand and her hips by the others. She yelps in surprise.

"I'LL TAKE YOU, TIFFANY!"

"That's Tatiana! I'm Tiffany." says the other girl.

"WHATEVER." You reply as you press the fat head of your cock against Tatiana's butt hole.

She had expertly prepared her ass with the soap, but you are massive. It was going to be a struggle. She takes one deep breath before you push her tits first into the wall. The air rushes out of her little lungs but Tatiana doesn't falter. She continues to press her asshole back into the head of your cock. Maintaining your tight grip on her pigtails you press your stiff shaft against her sphincter.

"AAaaaaaaaaaaaaaAAaaaaaaaaaaaaargh!" Tatiana moans as her butt resists your advance.

"You can do it, sister!" her twin encourages her.

You press harder practically lifting Tatiana off the ground. She strains on her tippy toes attempting to relax... until...

POP!

The head of your dick rips past her lubed up sphincter. She howls in joint pain and victory, "Master... gaaaaah! Take... as much... of this... ****... as... you... uuuuuhhhhhhhh... need!"

You **** your way further up her backside. Only a few inches in you reach a depth she was unable to lube with her fingers. You move your cock up and down her insides attempting to work more of the soapy suds into your shaft. She grunts in effort with shallow strained breaths. She mutters to herself, likely trying to recount the lessons of her **** anal training.

"How am I, Maaaaaahaaaaaahaaster!?!?" she grunts.

"HOW MUCH DO YOU THINK YOU HAVE FIT IN THAT LITTLE ASS OF YOURS?" you say studying her speared anus.

"Maahhh... Master... It feels... like... a... truck in my... asshoooooooooooooole!"

Her sister Tiffany shudders next to her along the wall. You realize she probably just came from watching her sister's ass being ravaged. She's an excitable one.

"SIX INCHES, ****. YOUR HALFWAY THERE."

"Don't... stop..." she begs through shallow panicked breaths. Tatiana is determined to accept all of you.

You pull her further down the length of your cock causing her to shriek in pain.

"Master!" she cries, "I think thhhhhhat's my... limit!"

You study her stuffed asshole. She still has several inches to go. You are tempted to push her limits, but come up with another alternative.

"YOU'VE DONE WELL GIRL," she sighs under your praise, "BUT YOU OWE ME AN ORGASM. ONLY THEN WILL I WITHDRAWL."

This elicits a strained laugh, "Of course Mast...Masterrrrrrr."

She reaches down and begins fingering her buzzing clit. You think about correcting her but decide the poor girl has endured enough. She should be allowed the use of her hand. You pull her roughly away from the wall by her pig tails. She yelps and teeters on her tippy toes, but she succeeds at remaining speared on your cock and playing with her clit. You help encourage her incoming orgasm by reaching around her and roughly playing with her perky fat D-cups!

"Gaaaaaaaaaaaack!" she cries out as her anus squeezes around your stiff cock.

You savor her orgasm and wait for her sphincter contractions to subside before releasing her hair. She falls face first to the tile floor. She whimpers under her augment's continued clitoral **** and massages her empty gaping asshole.

Tiffany stiffens as you immediately press yourself against her butthole. Your cock has been more thoroughly coated with the soap from her twin sister's asshole. You quickly breach her tight sphincter.

POP!

She wails in pleasure and pain as your dick snakes up her intestines. With a few quick thrusts you have crammed your dick up the majority of the way of her insides. The last several inches have less lube and elicit an intense reaction from the girl.

Your hairy pubic mound smashes into her butt cheeks. She sobs in relief knowing she has successfully accepted your entire 12 inch length within her bowls.

"BE A GOOD GIRL AND CUM FOR YOUR MASTER."

Tiffany requires nothing more than your command. She cums hard and fast causing her sphincter to massage the base of your manhood.

"GOOD GIRL." you whisper in her ear causing her to cum a second time.

You withdrawal from her causing a moan of protest. She falls to the floor with her gaping asshole throbbing around the sudden emptiness.