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Phobos stared at his boner. He mentally cursed at himself for getting a boner at the dinner table. Not his fault though, his dad shouldn't have such a nice ass and a fuckable face and- Phobos was getting a bit off track.
"Um I have to go do something real quick yeah"
Phobos excused himself from the table before running off to the laundry. There he found one of Earth's dirty boxers. He grinned and start sniffing it. He knew he looked like a degenerate but he couldn't bring himself to care. He took his sweatpants off and rubbed his cock through his undies. He got an idea, a rather risky idea. He stood up, still pantless and still holding his dad's boxers he sprinted to Earth's room. He shut the door and climbed onto the bed. He took his shirt off and grabbed Earth's pillow.
"Sorry father..."
Phobos muttered before starting to hump Earth's pillow. He started thinking about earth.
"oh Phobos, jerking off to your Daddy. You don't need that pillow when you can have the real me"
Earth said, almost moaning. Phobos grinned like the idiot he was and watched his dad strip. Once earth was naked Phobos jumped onto him and started sucking his cock. Earth was whimpering loudly, praising him for doing a good job. Phobos tried his best to take Earth's entire cock into his mouth.
"Good job baby but now you to have fuck daddy in a different way now"
Earth said seductively, turning around so his ass was facing Phobos. The largest moon of mars grinned and pushed his cock into Earth's ass. He thrusted as fast as he could, he had one goal: make earth cum.
"That's it dear, fuck daddy harder~"
Earth moaned out. Phobos did just that and soon earth came all over the bed. Phobos was close to his orgasm. He was fucking earth like a mutt in heat.
Phobos came, not caring about how it filled up his boxers. He looked at the aftermath of his actions. But frankly he was to tired to care and he passed out.
"Welp mars that was a good meal but imma head to bed bye!"
Earth said happily, walking off to his room. He opened the door and froze. On his bed was a passed out Phobos who was in nothing but his boxers. Earth noticed that his pillow was under Phobos. He sighed and grabbed Phobos who whined softly.
"Ok your shirt is here and- where the fuck is your pants mister?"
Earth asked, though he was asking himself since Phobos was asleep. Earth put Phobos back into his clothes and noticed to cum stained boxers he had on. Earth muttered something before carrying Phobos to his room. He placed him onto his bed and left. Earth decided to take Phobos's laptop away before leaving though.