The door opened and Rupert and Mariko stepped in, depositing their shoes at the door. Mariko walked through the house, calling out for Julia and Jim to see if they were home. Julia called out from the bedroom where she and Jim were still locked in a lover's embrace.
Mariko stuck her head in the door and smiled at the two naked bodies lying on the bed, mother and son. Rupert walked up behind her and fit himself against her butt, reaching his hands around her to squeeze her breasts.
"Have you been fucking your mother again?" he said, his mouth twisting into a sly grin.
"Of course, and what about you? Been getting any of that Japanese nookie?"
"He's so bad," Mariko said. "He make me take off panties and then when I sit down everyone can see."
"Well, let us see," Julia said.
Rupert flipped up Mariko's skirt, showing a brief flash of the soft hair covering her pussy. She slapped his hands playfully and shrugged.
"See, what I tell you? He's bad boy."
"But it looks so good," Jim said.
"See, what'd I tell you?" Rupert said. "It's not bad, it's good."
"Good and sweet," Julia said. "How about giving us a little show? You know, showing us how sweet her pussy is."
Mariko blushed a little, and the extra red made her face light up. She spun around and her skirt flared out, exposing her bare butt. Rupert smiled and reached for her, but she moved just out of his reach, starting a slow striptease. She encouraged him with her hands, and he eagerly left his clothes on the floor, joining her as she stepped out of her skimpy garments.
Julia and Jim moved aside to make room for the dancing couple on the bed, and Rupert pushed Mariko under him. She opened her legs wide and put her arms around his neck as he pressed forward, his dick moving up the crevice between her legs. The tip of it found her opening and started inside. She made a sobbing sound from deep in her throat and he worked his hips in and out, gathering lubrication from her wet cunt as he pushed his cock into her.
Julia put her hands on Rupert's back as he started to fuck Mariko, sliding them up and down in a loving caress. She massaged his butt cheeks and spread them apart a little, and traced the depression with one long finger, teasing at his asshole. He grinned at her and plunged his dick all the way into Mariko's now sopping pussy.
"Feels good," he said.
"Uh-huh," she said. "But we want to see you eat her pussy."
"Okay, sure," he said, withdrawing his dripping dick from the tight hole he'd just been fucking.