Supernaturally bestowed genitalia will do that to you...

Lara was gradually brought out of her trance as Roth's grinding became more insistent: he almost pulls away till his cock-head slides down, before pushing up through her crack and across her backdoor. Soon his thrusts are quite heavy and his head begins to catch as it passes over her anus. Gasping from the unfamiliar sensations she turns her head to look at him with wide eyes.

"Don't be afraid, Lara, I'll be gentle. You lubed me up quite nicely. Just try to relax..." Kissing her he continued to lavish attention on her breasts, grazing her nipples till she was gasping and pliant against his lips. Then he started pushing in earnest at her back entrance, gripping her around her waist as his head slowly stretched the vice-like band.

"AAH!" Lara screamed from the unfamiliar intrusion, reflexively jumping forward to try and relieve the massive pressure. Roth's arms around her hips prevented her from escaping and all she did was fall forward onto the bed: "Assuming the Position." Roth was indeed quite gentle but his cock was so huge that Lara was certain she would rip as his bulbous head finally stretched open her back door. Grabbing fistfuls of the bedsheets, Lara gritted her teeth, squeezed her eyes shut, and tried her best to follow Roth's advice. After a few moments of the new invader stretching out the tight muscles, Lara breathing heavily as though she was lifting some great weight, the pain started to recede and she gave a small nod to show she was ready.

Roth slowly started to sheath his weapon in her bowels, moving with incredible patience centimeter after centimeter slid inside her. As each moment passed Lara was certain he had to have reached the end, he must have run out of cock by now, but he just kept sliding more and more of himself into her. Her hands clawed at the sheets, grasping at anything to take her focus from the nonsensically massive tool pushing inside her. She was taking great gasps of air, eyes still shut tight, when finally she felt him slow and his cock stop pushing into her. She had never felt so full, the pressure was incredible. After a minute or two of catching her breath she opened her eyes to see Roth looking down at her through the mirror.

"You are so beautiful Lara." With that he started to pull back, leaving a cavernous emptiness behind as he withdrew from her bowels. Lara groaned from the peculiar sensation, noticing that his cock was throbbing inside her and each time it did a strange echo followed suit in her own groin. A bizarre collapsing sensation filled her as Roth pulled back to just his head, her overextended entrance stopping his retreat. "Just hang in there, Lara. It's about to get better." Whispering reassurances behind her ear Roth began the process again, bringing a deep groan from Lara as her insides once more filled with his meat.

After the fourth repetition Lara was beginning to grow accustomed to the new sensations and Roth started to speed up his thrusts. Not by much, but enough for Lara to start feeling a little whisper of pleasure from the rectal massage she was receiving. As his speed increased Roth leaned into Lara, pushing her down onto the bed as her already shaky legs gave out. Before much longer he was beginning to piston in and out of Lara's ass, making the pale globes jiggle pleasingly as her groans increased in pitch and frequency. The light blows she received at the end of his thrusts made her clench around him as he retracted.

"Naaau-Aaa-Uhn-Uuugh!" Now that the pain had faded to a background ache Roth really kicked up the pace, ramming into Lara's pulverized anus almost up to his hilt several times a second. She was beginning to feel a strange pleasure warming in her bowels and a more familiar pleasure growing in her groin.