There were certain things about the universe and its constants that one learnt when travelling with the Doctor. Most were of little practical value to someone from the late 20th/early 21st century period of Earth history that the Time Lord liked to frequent, a conscious effort on the Doctor’s part to avoid exposing too many companions to knowledge that might derail the impending 22nd century Dalek invasion, but one thing he had taught all of his companions was how to seem unimportant.
Both by his massive ego, whose metaphorical size dwarfed galaxies, and his advice that by seeming small and harmless, those who were arrogant enough to think that their power made them untouchable would always underestimate the plucky youth (or Time Lords whose regeneration caused them to looked youthful) with a clever idea.
So even though Sarah Jane Smith and Clara Oswald were no longer small, and now strong enough that their pinky fingers would qualify as anti-Dalek weapons, playing the part of the braindead beauties came rather naturally to them.
Of course, also being one of the Doctor’s companions, Rose would know all the tricks from the companion playbook but Clara had waved off these concerns, noting that Rose, while clever, had a poor track record for seeing through tricks and that the early 2000s working class neighbourhood the blonde had grown up in had given her just enough mildly homophobic tendencies that she would ignore two girls being friendly by raw instinct.
Though Clara had not told Sarah the full story of how she knew this, the Impossible Girl waving it off as some “echoes” of herself having spent some time around Rose, but there was no time like the present. And so both brunettes came close together and, in perfect sync, slammed their hips into the wall Rose was standing atop of.
In all fairness, it did help that Rose was somewhat distracted. Her plan was to meddle with the Doctor’s timeline and eliminate those female companions whom he’d formed strong romantic bonds with so he would love only Rose herself. And already having the Doctor’s two most important companions as her prisoners (and how it infuriated Rose that she was, at best, the third most important! Infuriating!), Rose was now struggling to remove another. After all, if too many companions were removed, then the Doctor might not meet her. Besides, she didn’t want to deal with too many giant girls if her device kept malfunctioning.
Before she could think on it more, a tremor ran through the facility and Rose quickly lost her footing, stumbling back and falling off the ledge. Rose Tyler screamed incoherently as she fell only to land squarely between Sarah and Clara’s squished together breasts.
“Ha! It worked!” Sarah smiled as she hugged Clara tighter, the four massive breasts squishing tightly around Rose.
“Yep.” Clara smirked as her massive fingers plucked something off of Rose’s wrist. “Vortex manipulator. Cheap but functional time travel.” She noted as she tossed it aside. “No teleporting your way out of there. And… um.” Clara trailed off. “Now what to do with you?”
“Now you let me go!” Rose snarled, futilely slamming on the breasts. “And maybe, when I’ve got history as I want it, I’ll leave you both on some barren moon with a single fruit tree instead of an asteroid so small your bums will be generating most of the gravity!”
“You don’t know how to negotiate with people do you?” Sarah asked, hands on her hips. “Also you can’t grow a fruit tree in an otherwise barren land.”
“Well if the device had worked properly you’d be two naked little dress-up dolls for mine and the Doctor’s future daughter to play with.” Rose muttered, petulantly kicking Sarah’s mammaries as she reached for something on her belt, holding it up and aiming it at her neck. “But now-”
“Oh that thing.” Sarah cut off, pulling the device out of Rose’s hand and bringing it up to her eye to finally identify it. “Oh it’s a Tissue Compression Eliminator. So that friend of the Doctor’s was the Master?”
“The who?” Rose asked.
“You didn’t meet the Master?” Clara asked.
“He’s every Bond villain ever. Probably inspired the archetype. Maybe had a beard?” Sarah offered.
“No, I was given the device by a Scottish version of Mary Poppins.” Rose said.
“Yeah that was the… ok so this is all Missy’s doing. The Master’s just having some fun at our expense. Reversed the polarity of one of their TCEs and now we’re big.” Clara sighed.
“Well,” Sarah started with a sultry smirk as she tossed the TCE aside. “We shouldn’t just forgive Rose’s role in all this. Master or no Master, she did plan to radically alter history for selfish purposes.”
“Ooh you’re right about that.” Clara said, taking a booming step towards Rose, squishing the blonde further between the two massive pairs of breasts.
“Alright, girls.” Rose gasped. “A bit too tight.”
“Aww poor baby.” Sarah cooed with false sympathy as she stepped back. Rose gasped as the removal of Sarah’s breasts left her hovering before she fell into Clara’s waiting hand.
“I would say that it’s those pesky clothes of hers. What do you think, Miss Oswald?”
“Too right Miss Smith.”
“Hey!” Rose snapped impotently as her clothes were ripped off her.
“What?” Sarah coyly asked as she stuck Rose between her breasts again, “You were going to grow yourself and become naked anyway.”
Before Rose could respond to that, rather valid, argument, Clara’s breasts slammed back against Sarah’s. They were only slightly larger than Sarah’s, but to Rose, they were big enough to seat five of her.
Without even acknowledgement of Rose, the two brunettes leaned into each other and began making out. Every slight movement on their part was a deafening assault for Rose. She kicked and squirmed but it was all for naught as her movements served only to excite the two giantesses.
Rose gave a frown. She’d get out of this, she knew she would. That friendly Scottish woman would help her out again. But for now, it seemed she had to suck it up and be a pleasure object for what history said were the Doctor’s two most important companions before she got her happily ever after.
1) Rose’s movements continue to excite the two brunettes who evolve from making out to having sex with Rose in between them.
2) As the giant girls make out, Clara’s growth wears off. Making the best of it, Clara goes spelunking inside Sarah Jane who sits her humongous ass on Rose.
3) In their lust, Clara and Sarah blindly step on the vortex manipulator, warping all three girls through time and space.