They walk in on Marcus with Allie's mother

Allie's house was a little smaller and more run-down than Enzo's; her family wasn't exactly well-off. Their financial troubles had started when Allie's mother Susan was **** to quit her job. An Alpha tourist burst into her law firm one day, and unlike most of his kind, he wasn't just there to fuck the employees. He went around telling all the paralegals that "women belong in the kitchen," ordering them to quit their jobs. In the case of a few (including Allie's mom), he also said they should focus on their cooking skills and get nice and fat.

Susan had always been the breadwinner, and her husband had difficulty supporting the family on his meager income. She remained a proud mother through it all, though, raising Allie well even as she ballooned into a bonafide BBW.

She didn't look too "proud" when Enzo and Allie walked in, however. The living room was a mess, littered with empty pop cans and a few pizza boxes. In the middle of it all was Susan, face down and ass up... And Marcus, bucking like a cowboy as he rode her colossal rear end, feet barely touching the floor.

"H-hi, honeybee," Susan moaned, propping herself up a few inches to look at Allie. Her tits were still squashed against the floorboards, spilling out on either side; she was at least as well-endowed as her daughter, and the extra pounds had only added to her bust. "Oh, hi Enzo."

Enzo tried to greet her, but the only sound that came out of his mouth was "mrrgh." He was staring at her backside... Or, more accurately, at the huge cock pistoning into her. Marcus had clearly popped a few Alpha meds: his shaft was at least two inches across, and a heavy set of balls was slapping his "steed's" ass cheeks.

That wasn't the only evidence of Alpha ****. Several SpermiZan-enhanced loads were splattered around the room, from the pizza box that was dripping with more than cheese to one sticky patch that was clinging to the wall (about seven feet up, strangely enough).

"Heya, kiddos," Marcus said cheerfully, spanking Susan's ass hard enough to make her yelp. "Good to see you. I've been keeping your mom company all day... Not my usual type, but she's a good fuck. I could get into this 'feeding' stuff. Did you like the pizza I improved for you, Susan?"

"Y-yes, Sir--"

"No need for 'Sir,'" he laughed. "I'm not your boss, I'm just dating your daughter. 'Marcus' is fine... Mmm... Hey Allie, I'm gonna nut. Can I borrow your tits?"

"Of course," Allie said, her tone unreadable to the thoroughly-overwhelmed Enzo. She wasted no time getting on her knees beside her mother, though, pulling up on her tank top until her huge round breasts bounced into view.

"Thanks babe," Marcus grunted, hopping off of Susan. As he slapped his rod down on Allie's tits, Enzo's eyes grew wide: his girlfriend was busty, to be sure, but her breasts weren't nearly large enough to wrap around the meaty, glistening shaft that fell between them. It was easily a foot long; both Allie and Enzo stared at it for a few seconds, wondering how it had fit in Susan's pussy.

As if on cue, Susan groaned and toppled over. Cum was leaking between her thick thighs, presumably from a previous load... Unless that thick, white river was just his pre-cum.

Either way, he had plenty left. The moment Allie squeezed her tits around Marcus's cock, it began to erupt thick, gooey blasts of jizz all over her face and cleavage. She was thoroughly-coated within seconds, but his orgasm lasted for far longer, and soon the entire front of her body was dripping and white. She blinked as it got in her eyes, sputtered as it filled her mouth, and trembled as the unrelenting wave soaked through her top. Allie had taken other Alpha loads, of course, but this was far beyond anything cooked up by Gary or the SpermiZan-popping tourists she'd run into before.

"Mmmgh... Fuckin' finally... You really know how to empty my balls, babe," Marcus groaned, grabbing Allie's tits and squeezing them a little more firmly around his shaft as he pumped out the last of his load. "Your mom's fine, but... Wow."

"Mm-mmph," Allie replied, before swallowing and licking her jizz-coated lips. "...Th-thank you."

"Man, I'm hungry," he continued, stepping back and letting his cum-slick shaft flop out of Allie's cleavage. "You guys want pizza? There's still lots."

"Oh, um," Enzo finally spoke up. "I'll just go, then--"

"Nah, you can stay," Marcus said with a grin. "Let's all have dinner together."