An old dog, new Tricks

  Valkyr swung from the tall cliff sides surrounding the long-extinct ruins of Mars with her Rip line ability. The sweltering rays of the sun bared down on the red planet and peaked through the craggy rock walls, illuminating the winding pathway. Scattered throughout the various caverns, sandy roads, and open areas, the Grineer had built one of their many homes.
  She paid little attention in the way of the Grineer taking pot shots at her, for they weren't the priority target that had hid themselves among the many winding underground tunnels. The radar on her HUD emitted a short beep, and the Lotus followed it up with a message informing her that the target was close.
  During the brief distraction Valkyr failed to take notice of her depleted energy bar, a shocking revelation made known by the obnoxious buzzing of her HUD. She leaned forward and tucked herself into a ball to land safely, a feat she had performed so many times before that it became second nature.
  The landing stuck but not without consequence. The fine sand underneath her feet gave and she stumbled towards the sandstone wall, then clumsily she tripped over her own feet and lodged herself in a small opening. The attempted struggle to free herself failed miserably and only further solidified the realization that she was indeed stuck. She stood on her tiptoes and wiggled her hips while rocking her shoulders back and forth in an attempt to free herself.
  Taking a short breath, Valkyr reluctantly halted her movement to assess the situation. At that moment a pair of mysterious hands, the digits course like sand, took hold of her wide hips and ever so gently they tugged backward.
  Rather than attempt to set Valkyr free, the hands rounded the plump mounds and took hold, their grip firm and deliberate. The digits sunk into the supple flesh of her buttocks, paused, then parted them as wide as possible without inflicting pain.
  "I'll rip the flesh from your bo... Eeek!" Shrieked Valkyr as a cold and wet nose brushed against her perineum then proceeded to sniff as a dog would.
  A fiery cylinder slid up and down between Valkyr's cheeks followed by a thick ball that resided at the base of the cylinder. Valkyr immediately recognized it as a canine's penis, knot and all. Though she couldn't say for sure, she had a pretty good idea of whom it belonged to.
  A swift kick landed between the assailants legs causing him to lash out in pain. He located the tender flesh of Valkyr's thighs and lifted her legs to either side of his waist, then quick as a snake he delved the tight confines of Valkyr's moist pocket. The pointed tip of his penis prodded repeatedly into Valkyr's cervix, just enough that the watery prostatic fluid which intermittently fired from his urethra gained entry.
  Valkyr felt the large knot press against her vulva and with each subsequent thrust it bulged and increased in size. No matter how much she squirmed and flailed her legs against the assailant's back his rhythmic thrusts kept her from making any real progress towards dislodging herself from the sandstone trap. She remained where was she, her body quivering with rage and on the point of entering Hysteria. Though she staved the frenzy out of her own well being, the anger continued to well inside of her.
  With a flurry of barbaric thrusts the massive knot shoved Valkyr's labia aside and entered her canal. The fleshy walls bulged outward, struggling to accommodate the baseball sized girth, and clamped down simulating a copulatory tie. At the same time, the head of the off-white colored penis covered in red veins pierced Valkyr's cervix and began the lengthy process of depositing his fountain of watery cum.
  Below him, a fierce roar was unleashed that echoed through the deep and winding recesses of the Grineer Settlement. The roar attracted the attention of a single Grineer Scorpion who made her presence known by yelling and scrambling towards a control panel.
  In a brief lapse of panic the assailant attempted to dislodge the bulbous knot from his prey, but in doing so freed her from the sandstone prison. Valkyr gazed upon the visage of her rapist as she sat in his lap on the warm sands, knot still bulging and pumping seed inside of her womb. She instantly knew the Warframe as Inaros, or "Doggy-dick" as she often referred to him as. How she hadn't realized his identity from his cock alone was lost to her, for several times prior it had been willingly locked inside of her for hours at a time before becoming disengorged enough to be pulled out.
  With an overly friendly wave Inaros greeted Valkyr. "Don't be mad at me, be mad at the Grineer who's about to set off the alarms."
  For the next ten seconds Valkyr treated Inaros's scrotum as a punching bag and inadvertently allowed the Scorpion to set off the alarms. The pain not only forced a strand of the watery cum to be ejected inside of her, but softened the knot enough to allow her to dislodge it from her vagina with an audible pop.
  Valkyr allowed the rage to consume her. The ensuing screams echoed once more through the caverns, then she propelled herself through the air and landed with her claws fully extended on top of the Scorpion. Blood, gore, and shreds of bone splattered across the sands and walls as she mauled through the protective steel suit.
  She rose to her feet a bloodied mess and glared at Inaros with such savagery and ferociousness that he immediately turned heel and ran towards extraction, leaving Valkyr to take out her rage on the poor unsuspecting Grineer.
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