Sure! If she can make her huge cock fit. But considering Sheila could take Lynn...

Dawn reluctantly pulled her head back from her glans, her breath washing over the spit-slicked, hot flesh. But jamming it in a tight, warm hole...

"I... in the ass?" She stammered, cock throbbing and straining against her arms. "Y-you think it'll fit?"

"If she can take me in the front, she can take you in the back." Lynn's assuring words were underlined by a blissful moan from Sheila, who's ass was still growing little by little every time she humped the latex cop's cock. "Now stick it up already!"

Finally following Lynn's orders, Dawn used both hands to lift her throbbing, rock-hard fuckstick until it rose up straight, a steady stream of pre-cum flowing down its length, slickening both the shaft and her fingers. Lynn smiled lewdly and stepped closer, slowly lowering Sheila until Dawn's fat glans began pressing against the frat girl's backdoor. Sheila's head snapped up, her eyes suddenly huge - not only was today the first day she had her pussy pounded, but now her ass as well?! Would she even be able to take it? But she needn't have worried. Even with arousal flooding her brain and impeding her thoughts, Dawn was impressed by how easily Sheila's sphincter gave way.

But even so, it was a tight fit, simply due to how massive Dawn's member was. Not that Lynn gave the two frat sluts much choice, unrelentingly squatting lower and lower. With every downward inch, Dawn plunged deeper inside her frat sister, Sheila babbling incomprehensibly as she felt both her holes stretched impossibly. Dawn could feel Lynn's gargantuan latex schlong press against her own cock, the medial ring soon rubbing against the more human shaft. It even seemed to throb, despite the fact that the fuckdoll cop didn't have a heartbeat anymore since her changes.

Dawn grunted and groaned very un-ladylike as her cock was squeezed tightly by Sheila's uncontrollable twitching, but the frat girl's ass still gobbled up the pre-slicked shaft with amazing ease. Whatever was happening to Sheila made her insides just as inhuman as Lynn's outsides, enabling her to accommodate to gigantic dicks with relative ease - not that her outsides where staying the same, of course. By the time Dawn's cock was halfway up her ass, said behind had swelled up to an impressive bubble butt, jiggling with every helpless twitch of Sheila's body.

"Oh god, you're breaking me, you're splitting me open, toooo biiiiig~!" She babbled, an endless string of incredulous, lustful gasps leaving Sheila's lips as she clawed at Lynn's rubber shoulders. "I ca--I can't take it, I can't--"

"Nonsense." Lynn's voice was firm, commanding, but the look she gave the frat girl was surprisingly affectionate. "You took my cock without issue, you'll be able to take Dawn as well. Trust me, we're going to pound you so good..."

Her eyes huge and fixed on Lynn's shiny black face, Sheila gave a shaky nod, only for her features to twist into an expression somewhere between lust and pain again as Lynn continued squatting down again. Dawn sat up as the last inches of her enormous cock disappeared into an ass that had grown to truly mind-blowing proportions, supported by fittingly thick, soft thighs. Wrapping her arms around Sheila's torso, Dawn was only half surprised to find pert little tits on her friend's front, capped by inverted nipples hidden in puffy areolae.

"I... so full... can barely... breathe..." Sheila gasped, arching her back as Dawn palmed the frat girl's palm-filling breasts. The movement bent Dawn's cock slightly, making clear just how deep she reached.

"Oh, this is just the beginning, my little butt slut," Lynn grinned, grabbing Dawn by the elbows and forcing her to stand up, Sheila sandwiched between the other women's much bigger tits, one pair rubbery and firm, the other fleshy and soft. "Now, the real fun begins."

Before Sheila or Dawn could form a reply, the latex cop grabbed Sheila's cushiony ass and began pumping her animalistic cock in and out of the frat girl again, the blunt head and medial ring rubbing against Dawn's length within. The frat slut took that as her signal to began her own thrusts, quickly falling into an alternating rhythm with Lynn. Since the rubber cop was holding Sheila up all by herself, Dawn could focus with the other girl's cute little boobies, pushing the tip of her pinky fingers inside the hidden nipples, intent on teasing out the shy little nub. Easier said than done, with Sheila's body rocking with the thrusts.

"Nnngaaah, ooohnnngaawwwddd..." Sheila's moans had become completely incoherent in the face of the pleasures assaulting her. Not only was she not used to her pussy being ravaged by a gargantuan cock - or even having one in the first place - but she also had never tried anything freaky before. Like, for example, shoving a foot long cock up her ass. Let alone up both holes at the same time.

It was thus not surprising that her frantic moans soon grew loud enough to echo through the whole frat house. Not that Dawn was doing much better: Sheila's ass was almost unbearably tight, squeezing the frat slut's cock exquisitely, but that also made pounding it hard work, making Dawn's muscles burn as she pistoned in and out of her friend. Lynn obviously didn't have that problem, unrelenting in her thrusting, making Sheila's cunt squelch and twitch around her length.

"See, I told you you could take it." It was almost eerie how not out of breath Lynn was. Her voice was tinged by lust, yes, but there was barely a hint of exertion as she hammered away. "And judging by that look on your face, you're enjoying this even more than we do!"

"If it... feels as good for her... as it did for me," Dawn grunted between thrusts, finally successful in getting Sheila's nipples out of hiding and promptly pinching and pulling them. "... We're gonna blow. Her. Mind!"

It certainly looked like it, with Sheila's head lolling back weakly against Dawn's muscular shoulder, mouth hanging slack as her eyes fluttered half closed. Her body was bouncing helplessly as she was used as a fucktoy by the other two women, and Dawn's heart beat even faster as she remembered how it had felt when she had been in the frat girl's place not too long ago, with a gigantic cock ravaging her asshole, making her bounce helplessly. It would have made her envious, if her cock hadn't been buried deep inside that tight butthole, spilling pre into its depths.

Every time either of the two women slammed her hips into Sheila's, ripples ran through her supple ass and thighs, making it shake like jello and sending loud slapping sounds of latex on skin and skin on skin echoing through the room. In case Sheila wasn't the only one home, whoever was still in their rooms had long since heard them, but the trio obviously didn't care for varying reasons.

"Oooh, someone's coming hard, huh?" Lynn said gleefully, digging her hands into Sheila's voluminous behind - and judging by how the frat girl's moans were approaching a fever pitch and her whole body shook and trembled, the mind-shattering orgasm wasn't too far off. "Let me help you with that!"

Shifting her stance so she could hold Sheila up with one hand, Lynn moved her left to were she was abusing the poor frat girl's pussy and began rubbing Sheila's clit. Her moans turning into a blissful shriek, Sheila clung to Lynn's shiny black body, pussy and ass twitching madly and milking horse and human cock as hard as she could. Dawn was actually impressed by herself not emptying her pendulous balls on the spot, but she could feel the tell-tale churning that heralded the deluge of cum she now produced.

"Not too far off yourself, eh?" Lynn grinned at Dawn, who was trying to hold herself back from cumming even one more thrust, her movements becoming jerky. "Lightweight. I could keep going forever!"

"You're... made ouuunnnngh...." As Dawn tried to reply, her concentration slipped and her nuts tightened almost painfully. She could feel her monster cock strain as cum bubbled up her length until it finally exploded into Sheila, entire loads of lesser cocks eclipsed by every shot. The frat slut bucked her hips, dimly realizing that Sheila had not stopped cumming yet, riding out the wave that was now elevated and drawn out even more by hot, gooey jizz filling her. Sheila's lustful cries had turned into strained gasps, sheer pleasure threatening to overwhelm her - she had been a woman for all of 15 minutes, her first sexual experience a threesome with gargantuan cocks in both her pussy and asshole. No wonder it seemed all a bit much for her.

After what felt like hours, Dawn felt the globs of cum peter out, her legs suddenly feeling weak after all this frantic thrusting. Extricating herself from Sheila's ass took a while, partly because of her impressive length, but mainly because Lynn was still relentlessly fucking the half-delirious frat girl, pounding away at her slick snatch. With her softening cock finally free, Dawn flopped back onto the armchair, her cum-slicked shaft settling between her massive mammaries.

While she tried to get her breathing under control, she looked up at where the other two where still going at it - or rather, where Lynn was still going at it, with Sheila as a willing, if completely overwhelmed, participant.