It had been about a week since the night Ben had decided to break in Gwen's ass, and he hadn't used her for anything yet.
Gwen thought he might have been giving her a break at first, but his casual groping of her body whenever they were out of sight from anyone made it clear he simply hadn't had a good opportunity yet.
Too many battles with aliens and human psychos, and he'd had to return the Plumber tonics to their hiding place for the moment so Grandpa Max wouldn't get suspicious of them being used, meaning no consequence free fun for a bit.
So when Max mentioned they were heading back out towards wilderness once more, she tensed, knowing exactly what she was in for when they arrived and were no longer being watched.
Max assumed she was just being moodier about going camping than usual, not seeing Ben's hand inside her pants under the table, making her squirm and twitch every so often as they traveled.
But sure enough, the second camp was set up and Max allowed them to explore un-interrupted, Ben pulled Gwen away with him to find a good spot to indulge himself with her body once more. Gwen wished now more than ever their grandpa would be less supportive of them spending so much time together.
'At least there's only so much time for him to get gross this time,' Gwen thought to herself as they walked, less time for him to use her in, so she couldn't get nearly as sore as last time. That was the logic anyway. In practice, this simply gave Ben incentive to make that little time count for a lot more.
Things started out fairly normal, Gwen on her knees, head bobbing back and forth along his cock as he held her head.
She refused to acknowledge it to herself, but she'd gotten pretty good at giving head from the experience; or at least had found Ben's spots. Wanting to feel more, Ben moved her head lower.
Gwen's face scrunched uncomfortably as Ben's sac set against her face, "Suck." Ben ordered.
He shuddered happily at the feeling of her warm breath against his sensitive skin, then moaned as she obeyed.
Gwen closed her eyes, not wanting to see any of it as she took her cousin's balls into her mouth. She held them there for a moment, trying to find a way to breathe that wouldn't let her smell or taste any part of this, but it wasn't possible.
The warm, wet feeling around them was already making Ben's cock twitch, and soon after she started sucking, Ben started to stroke himself gently. He used his cousin's saliva as lubricant as he let his precum drip into her orange hair.
She didn't notice at first aside from the sound of Ben working himself, then she shuddered as she felt the warm good in her hair. She sucked harder to try and finish him off faster, not realizing that she was getting a lot in her hair whichever route she took.
Ben grunted, holding Gwen's head in place with one hand as the other stroked out rope after rope of thick, white cum into Gwen's hair. The unpleasant sensation of it dripping through hair made Ben feel a bit ill.
"Are you happy now?" She questioned, as he'd not only gotten off but marked her again in the process.
"Not quite," Ben said bluntly, starting to undress, "Clothes off, on your fours." He ordered.
Gwen rolled her eyes at him, trying to make it look like she was over all of this and didn't care anymore.
In truth, while she'd grown to expect it, she couldn't actually get used to it. And even if she could, she certainly wasn't used to what Ben wanted to try today. Ben watched her strip, enjoying the sight on its own.
Gwen grit her teeth when Ben pulled her arms back, rutting her hard like usual. She managed to keep herself mostly quiet, even as the cum in her hair started to leak down onto her face, disgusting her more. Ben simply enjoyed himself, having missed the sensation of using Gwen for himself over the last week.
He eventually released her arms to instead pull her by her hips, grunting as he hammered into her.
Gwen's toes curled at the rough pace. It wasn't quite as rough as he'd gotten with her ass before, but feeling him hitting so hard inside her guts was starting to chip at her, eventually bringing her to an orgasm she didn't want to feel.
Ben grunted as he felt her walls gripping his dick as her body shook, "Wow, I didn't realized you liked it up the butt ithat/i badly~" He mocked as he came, flooding her bowls with hot, pent up cum.
The sensation sent Gwen's mind reeling. Her body was already glistening with sweat, chest heaving as she tried to focus on anything but the literal pain in her ass. And as she reeled from round one, Ben lifted his wrist to start round two.
Even out of it, Gwen felt her veins freeze in her body when she heard the distinct sound of the Omnitrix activating. Before she could beg for mercy or even react at all, he was on her; inhuman cock stretching her already abused hole.
He'd selected Wildmutt for his first alien to fuck her with, and had decided to use it to re-break his cousin's cute little ass. She had just cum after all, she must be into it~ Her body was certainly reacting to it at least~
Gwen didn't even attempt to hold back her screams this time. She knew Ben had brought them far enough out to not be heard, and even if they weren't his larger, hairy body further suppressed her voice.
Trying to silence herself was more an act of defiance than anything. But her will could only take so much, and ten inches of thick, solid, caninalien cock throbbing inside her was well and truly beyond the limit.
Ben let out a feral grunt, his body all but completely obscuring Gwen's smaller form beneath it as his hips pumped hard, forcing Gwen's body to stretch to accommodate him. Her body couldn't brace for it even if she tried, her hips forced back and forth by rough motions of her cousin.
He had intended to hold back at least a little bit, as Gwen would need to be able to walk back to camp, but she simply felt too good squeezing around him like this. The feeling of her body squeezing around his cock like a fleshlite he was about to break set off something intoxicating in him.
He hadn't even noticed he'd lost control until he'd already been rutting into her at full strength for several minutes. And at that stage, what was really the point in trying to hold back any longer? He'd just say they'd been attacked by aliens or something.
He dropped more of Wildmutt's full weight onto his cousin, forcing some breath out of her as his hips back rising and falling like a piston pounding into Gwen's ass as though trying to reshape her insides with his cock alone.
Gwen couldn't see anything but Wildmutt's fur, couldn't feel anything but the cold dirt and his hot, thick alien member using her like a breeding bitch. Her mind felt like clay being smashed with hammers.
As much fun as Ben was having, it could only last so long. Eventually Wildmutt's alien knot began to swell inside Gwen's ass, and Ben was quite sure he'd overdone at that point; part too late. He would definitely have to blame it on a villain attack now. Maybe even several.
It would certainly help him explain the intense Wildmutt howl he let out as he finished unloading Wildmutt into Gwen's ass, leaving her leaking in a near literal puddle of cum, as Max had all but certainly heard that echoing out through the forest.
He hadn't realized how long he'd been, but at the time he hadn't been thinking much at all. And as he returned back to his human form, he found himself growing stiff once again at the sight of Widlmutt's inhuman seed flowing out of Gwen's gaping ass.
He brought his hand down hard on her ass a few times to watch it bounce before thrusting back into her worn out hole eagerly. Gwen was barely conscious, but was still confused at why Ben would still be fucking her even now.
"Y..you.. You'll get caught." Gwen insisted, wincing at another smack to her ass before Ben bent over her to start hitting deeper.
"Eh, I figure I've got a good twenty minutes before Max finds us out here," He explained through grunts into her ear as he fucked her sore ass into the dirt, "Plenty of time to get one last load out and fix things up to look innocent~ Well, as innocent as they could look I guess."