Robin gingerly pulled his cock out of the humungous Martian’s ass. He could still feel her tight anus massaging his limp shaft, even after he had filled it with gooey cum. He pushed against her plush ass cheeks to pop his head out, a tiny trickle of cum following him as he left. Sweaty and sore after fucking Megan so hard from behind, Robin took a minute to catch his breath. He stared at her fat ass, imagining himself underneath it. The weight would probably crush him flat, but he would go out smothered in greasy, alien ass fat. His erection twitched to life at the dark fantasy, growing to full hardness quick for the next round.

“Turn over on your side and get ready to be fucked til you burst you fat bitch,” Robin growled and gave her huge ass an open palm smack. Her ass jiggled for Robin, getting him as hard as a rock. He was ready to fuck Megan, but the young alien seemed confused.

“Was that dirty talk? If you meant to call me a bitch and weren’t being playful I’ll leave. Friends don’t speak to friends like that,” Miss Martian huffed, very upset at the possibility that Robin was being rude to her. She was letting him live out his fantasy and now he was calling her a bitch. It almost made her want to cry.

“I was just trying to talk dirty. You’re not a bitch, you’re a sweet friend that will let me pound her pussy quick before I get blue balls,” Robin hastily said, his cock throbbing in anticipation to get some action. Megan considered his words for a few seconds, leaving Robin to try and calm down his ragging boner. Finally she cheerfully exclaimed one word. “Okay!”

The entire bed shook as Megan shifted over to her side. Robin was nearly thrown off the bed, but his excellent balance let him remain near his whale of a lover. Miss Martian turned to her right side, her huge belly flopped out onto the bed as her right breasts was compressed slightly. She stared down past her huge melons and even wider belly, spotting Robin between her legs. Waving at him, Robin just stared at the sexy fat form in front of him, his cock ready to explode at the sight of it.

Needing to stick his cock in something he grabbed Megan’s upturned leg and put it on his shoulder. He grunted at the weight, her chunky thigh sinking into his shoulder. Ignoring that for now, he pressed his cock against her pussy and slid in. It took every bit of Robin’s will to take her slowly, to hold off his instinct to fuck her fast and hard. He sank into her wet pussy, it throbbed and milked him just like her ass did. Megan had one great pussy. It was always tight yet never gave him too much trouble to get in. It was like her cunt was molded perfectly for his cock.

Megan moaned at getting filled, wiggling slightly at the pleasant sensation. Her belly and breast shook right in front of Robin, getting the boy even more turned on. As he sank into her snatch he wanted to grab her breasts, but all he could reach was her ass and stomach. He brought one hand to her gut, rubbing the soft flabby gut in circles as he grabbed a handful of ass fat with the other hand. Jabbing his cock forward, he buried the last few inches in Miss Martian and let out a groan. It was time to pound this pig.

Robin bucked into her harder a quiet slap following his deep groan of pleasure. He wasn't holding back as he shoved into her ass and thigh hard as he rammed into her. The sounds of the two rutting heroes filled the air, the squelching slap of skin on skin as Robin fucked Megan with all his strength mixed with their moans. Megan licked her lips and moaned, enjoying the feel of flesh on flesh and Robin’s big rod inside of her. It was great, but she couldn’t help but reflect that if it was even bigger it would be greater.

All Robin could focus on was the pleasure of her hot, snug pussy gripping his penis with each deep penetration and her ass bouncing off him as he buried himself in her. He sank his fingers into her belly fat and moved his hands into her ass crack as his balls pulled towards his body. He was ready to unload again, this time into a Martian womb. His fingers in Megan’s ass found her wet anus and slipped in. He fingered her ass quickly as he pounded her faster. He wanted her to cum, but all she did was moan even more in delight.

“Push your fist in my ass!” Miss Martian moaned as her body jerked and twisted in wonderful ways that made her fat wobble. Robin did what he was told, shoving his whole hand in. He could feel her anus around his wrist, tightening and holding him in place. Slimy anal flesh wrapped around his hand and that was it, it came.

“Fuck!” He screamed, slamming his side into her ass one last time as he exploded. Robin was taunt and twitching in
orgasm against her, his muscles rippling as he pumped load after load into her swallowing cunt. She felt her womb fill with hot, sticky cum and loved it as much as she did with her ass. Sighing in contentment, Megan just lay still as Robin groaned and shuddered through another orgasm. When he was over, Robin leaned up against her panting heavily.

“I’m…..Done…” Robin managed to say.

“Then I guess it’s my turn. I’m going to enjoy having you inside me,” Miss Martian giggled and Robin lifted his brow in confusion. Wasn’t he already inside of her? What more of him could she hold? And why was her anus tightening around his hand? His questions were all answered when Miss Martian….