Major could feel his cock hardening in his pants as he stared at his naked step-mother.
"W-why are you naked, Mom?"
"I heard you yell, and your comms went dead, so I ran out of the shower to help. No time to put clothes on." Maria Mars responded pulling her step-son in for a tight hug, his face going immediately into the valley between his step-mom's massive tits.
"Oomph!" Came Major's surprised, but pleased voice from Maria's cleavage.
Major reluctantly moved his face from Maria's chest so he could breathe. With his head over her shoulder now, still wrapped in a hug, Major Mars had a clear view of his step-mom's big ass.
"Holy fuck!" He thought, his cock now fully erect again in his pants, and pressed between Maria's legs. He wondered if she could feel it.
"I can't believe that monster came after you like that, honey. Good thing you knocked her out before she could do anything to you." Maria consoled him. She didn't notice the two massive loads of her step-sons cum slowly leaking out of a couple of the blue alien's orifices. "We will lock her in our spare quarters until we can return her to her planet."
"Y-yeah. I doubt she is actually that dangerous though. Could be fun to have another member of the crew." Major said, feeling guilty about fucking, cumming in, then abandoning the naked blue vixen back on her planet.
"Ha! Good one, honey." Maria said, squeezing Major tighter against her. "Oh, I'm just glad you're safe."
Maria tensed up, then let go of Major. "Oh, gosh. What am I doing. We're probably both contaminated from that thing. Come on, I'll beam the Foramine to the spare room and then I need to get you de-contaminated. You have no idea what kind of diseases that thing has."
Major hadn't even thought about that. He briefly glanced down at his dick and prayed it wouldn't start growing moldy blue warts after fucking the Foramine without protection.
While he was thinking, Maria had beamed the unconscious Gal away and took Major's hand. "Come on, honey. I guess I'm taking two showers today."
As Maria led her step-son to the captain's quarters to decontaminate, Major's imagination started running wild again, he imagined him and his step-mom in the shower together drenched and soaping each other's naked forms.
**************
Maria Mars stepped in the shower first and turned on the water. Major watched as the shower water fell onto his step-mother's naked body. Maria looked back at him.
"Come on, take your clothes off, honey. The sooner we get those contaminates off, the better."
"Oh! Uh, right." Major muttered, going to take off his clothing.
Major stepped into the shower, while trying to cover his hard cock from view. He was naked in the same shower with the woman of his dreams, how could he not be hard?
"Come here, honey. Let me help." Maria beckoned him closer to her and put some soap on her hands.
"H-help?" Major said.
Maria started soaping up her step-son's body. Her hands felt so good that Major started to relax and even moved away his hands from his raging boner, which immediately sprung free into the air and Maria couldn't help but stare. Her step-son had the biggest cock she had seen in years, maybe ever, and it was covered in some strange blue mucus. She reached down and unceremoniously touched the first penis she had touched since Major's father had disappeared. It was firm, warm even, and the skin appeared silky smooth despite the sticky mucous coating that was stuck to it.
Scrub as she might, the blue film covering her step-son's cock wasn't going anywhere. But Major's breathing was growing more jagged the more she handled his manhood. Major leaned back against her as she soaped him, grabbing onto his step-mother's firm ass for balance.
"Umm, honey. You're grabbing my butt." Maria blushed, growing increasingly more turned on.
"Y-yeah, unh!" Major responded. "I didn't want to slip. Sorry."
But he wasn't sorry. And he made no efforts to remove his hand as the woman who raised him unwittingly brought him closer to release.
"Why isn't this coming off!" Maria scrubbed harder, frustrated at her failure to decontaminate Major.
"Maybe it's waterproof." Major responded. "You remember the space explorer handbook, about decontamination of alien substances right? If soap and water doesn't work, try saliva. Our saliva has properties in it that has evolved over time to break down foreign substances."
Major Mars had never actually read the space explorer handbook.
"Well if that's what the handbook says," Maria replied, lifting Major's hard cock in her hand and spitting directly on it then rubbing her saliva into the erection.
It felt so good, and the mucous was starting to fade to a lighter blue but not completely. Major had an idea.
"That's better, but it's not completely gone. Perhaps it needs a more direct application." Major said, hoping his step-mother was either horny enough or concerned enough to go along with it.
"More direct? You mean, like I should put my mouth on it?"
"I think that would work, yeah."
Maria Mars had to admit that the prospect of sucking such a marvelous cock excited her, even if it happened to be attached to her step-son. Besides, the mucous didn't appear to be hurting Major. She deduced that it would be unlikely to hurt her as well, particularly if her saliva were to break it down enough.
"Well, the handbook was right about saliva. I guess it wouldn't hurt to see if we could make it's cleaning properties more effective." She said, already kneeling down on the hard shower tile.
She was now face to face with Major's monster. "Jesus, Major! I haven't seen a co-- I mean a penis-- this size since your father!" she commented with appreciation.
"I'll take that as a compliment," laughed Major, loving the enamored look spread across her beautiful face. He loved the feeling of her small hand on his engorged penis, but he had a feeling he was going to enjoy her mouth and tongue even more.
Maria leaned forward, but stopped just shy of putting her mouth on Major's cock. "It's been a long time since I had something like this in my mouth, honey."
Then, without another word, Maria Mars brought her face up just under the crown of her step-son's cockhead and slid her tongue along the area.
"Wow, this tastes good. Like, really good." When she was Major's age, Maria was quite the accomplished oral enthusiast, but no dick, not even her missing husband's tasted this good. She suspected it was the blue goop that was covering Major's dick. "Very interesting." She thought.
She licked the tip and circled it with her tongue in several rotations before opening her mouth as wide as she could and letting the tip slide between her warm lips. She was doing it. Maria Mars was slurping the first inch of her step-son's 12 inch behemoth and pretending she wasn't craving more.
Major's meat was emitting copious amounts of precum and his sexy step-mom savored every drop as it fell on her tongue, giving her throat a creamy coating.
"Oh my god, Mom. That feels so good," said Major, already forgetting about the reason she was on her knees with his cock in her mouth. Seeing the gorgeous Maria Mars, the MILF of all MILFs, with her lips wrapped around the end of his dick was intoxicating.
Hoping to fit as much of his dick in her mouth as he could, Major said, "ooohh. There is still a lot of blue down further, Mom. Can you go deeper?"
Maria was out of practice. She used to be able to take Major's father all the way in her throat, but it had been so long. She stopped and tied her wet hair into a ponytail with Major's cock still in her mouth, then paused, breathed and forced more of his prick into her oral cavity. She struggled and strained. Tears welled up in her gorgeous brown eyes and ran down her face before she had to pull off gasping.
"It's been so long. I'll get it all. Just need a little practice is all!"
"I know you can do it, Mom."
"Thanks, honey," said Maria, getting off of her knees and assuming a squatting position. She took Major's dick back in between her lips and began bobbing her head.
"Ahh fuck, yeah. Just like that," he said, enjoying the sensation of having his hot step-mom slobbering all over his cock. Maria put one hand on Major's hips to steady herself and for leverage. Her other hand roamed to her son's hard abs, and chiseled obliques.
"Oh yeah. Get it, Mom. A little more."
Maria was looking up at Major, soaking up his encouragement. "Try relaxing your throat, Mom." They maintained eye contact as Maria took him deeper and deeper, washing away the sweet tasting blue stuff on Major's cock. The buxom beauty was no longer pretending not to be into it. She was moaning and gagging with every new inch that entered her throat, bobbing her head even faster, and never breaking eye contact. She was loving sucking her step-son's meat.
Maria pulled off briefly, catching her breath. Both of her hands were massaging her saliva along the full length of Major's cock, the blue cream from Gal's pussy now almost completely gone except for the last few inches of Major's cock.
"I guess all you Mars boys are big," she said, entranced by his glistening meat as she stroked it. Maria smiled, a strand of saliva dangling from her chin. "And you last so long." Maria lifted his cock with her hand and proceed to slurp off the blue slime from the last few inches of his meat.
"There. All clean." She said, savoring the taste, but still feeling incredibly horny.
"Oh please, Mom. Don't stop now. I'm so close." Said Major, staring at his step-mom's huge breasts. She had pink nipples that went well with her porcelain skin.
Even if she wanted to stop, she wouldn't have. Maria resumed vacuuming Major's dick into her mouth while he slowly thrust his hips into her face, gently fucking it. Even though the blue substance had disappeared, Maria was still trying to take all of that dick into her throat, to prove to herself that she still could.
Her pussy was on fire too. She couldn't help but start playing with her clit, then started fingering herself while she squatted in front of her step-son, making slurping sounds.
The sight, sounds, and feeling had become too overwhelming. Major couldn't stop himself. "Ah! Fuck! I'm gonna cum, Mom."
Maria had nearly all of Major's cock down her throat at this point. Choking tears were running down her cheeks. She had been in this position before on many occasions when Major's dad was around. She wanted to experience it again.
Maria hadn't planned on swallowing her step-son's sperm, but the cock in her esophagus didn't give her much of a choice.
Then Major's head rolled back on his shoulders and his cock began jumping in her throat, testing Maria's gag reflex considerably just as her nice touched his pelvis.
