Hysteria beamed, curling an arm around Primal's chassis as she led him further into the shower.  His internal fans kicked into overdrive again as he soon found himself sandwiched between the pair.  His back was to Dinobot and Hysteria pressed against his chest.  This was really happening, hm?  It had been so long since the last time he’d coupled…  Primus, had it really been since Cybertron?  No wonder he was so wound up.  He’d let himself get rusty.

“I must admit,” Primal began with a nervous chuckle.  “Haven’t, uh… experimented like this before.  With multiple partners.”

“Is that a flaw common amongst Maximals?” asked Dinobot.  “Or is our leader as inexperienced in berth as he is in battle?” 

His words rumbled low in Primal’s audials.  As disrespectful as the jab seemed, the trace of friskiness was not lost on him, nor was the way Dinobot’s rigid grill structure pressed against his aft.  If he didn’t know better, he’d think the ex-Pred was enjoying himself.  Was there was more to Dinobot than meets the optic?

“I suppose you have a formidable body count, Dinobot?” Primal teased back, earning a growl from the mech.

“It is… adequate.”

“Don’t worry about any of that… Just relax and follow our lead,” said Hysteria. “We’ll figure it out together.”

Her servos roamed down Primal’s frame, digits carding through the now-damp gorilla fur.  Raptor claws simultaneously raked his shoulder kibble.  Their combined touches and the steady pelt of warm water were electric, sending a pleasant static through his frame.  Primal’s optics dimmed as he tried to let himself enjoy the moment and not to think about how slagged he’d be if any of the others were to wander by— or Primus forbid, a sudden Predacon ambush.  Those qualms were the furthest thing from his processor when Hysteria began tracing the seam of his pelvic plate.

“Alright, show us what you’ve got, Big Bot,” she coaxed.

Primal hesitated, especially with Dinobot’s helm craning over his shoulder.  With an ex-vent, he reached down to remove the panel that was preserving his modesty, allowing his spike to pressurize to its full length.  Time stood still.  His fans stalled as he waited for some acknowledgement from either of them.  The initial reaction was subtle.  Dinobot’s grip on his shoulders clenched.  Hysteria’s optics flared at the sight before her.

“Hrm… It is… not bad,” Dinobot softly admitted.

“Nah, it’s just prime!” Hysteria exclaimed. 

Primal let out a laugh of both amusement and relief.  “… That’s my line.”

She took the spike in her servos and gave it a stroke.  Transfluid coated the length as she began to pump it.  That alone probably could have brought him to overload if she kept at it.  She looked up from the spike and met Dinobot’s optics.

“You bored back there?” she asked.

“The femme’s intuition is strong as ever.”

Hysteria scoffed and directed her gaze to Primal.  “Up to you.  You want me in the middle?  Or do you think you can handle him?”

All logic circuits were telling Primal to let Hysteria be in the middle… but for once, he had the opportunity to let others handle things.

“… Dinobot?” he said.  “Yeah.  I can handle him.”

“We shall see about that, Optimus.”

Plating was quickly removed and panels retracted.  Hysteria braced herself against the wall as Primal guided his spike into her slick valve.  Her channel was tight as a vice.  For a nanoklik, he wondered how Dinobot would be willing to share something as incredible as this, but it was apparent by now that it was Hysteria that had him by the bearings.

Once Primal had full sheathed himself, Dinobot didn’t hesitate.  His claws dug into the other mech’s sides and his own impressive spike pressed into his leader.  Primal stiffened at the intrusion and let out a groan.

“Frag… You always… were a pain in the aft, Dinobot…” he said through gritted denta.