To... repair her relationship

The slime was already getting used to the experiences of its new body. It usually disliked filling and pretending to be these primitive meatsacks, but these humans already seemed better than most. The curves of Tracy’s body were… enjoyable to see and touch, and the sensations it gave her were equally intriguing. After dressing in garments Tracy’s memories deemed appropriate, the slime descended down the stairs for its first major test.

Tracy and Ethan had, not an hour ago, argued. But now that she’d had her change of heart, Tracy was determined to repair their relationship, if for no other reason than the fact that the alien slime hiding in her body wanted the connections their relationship afforded to infiltrate human society. Thankfully, Tracy knew exactly how to change the mind of her husband.

She descended the stairs, feeling her body jiggle ever so slightly as she did. In the living room the television was on, showing the latest sports game Tracy did not know much about. Ethan was on the couch nearby. He was a man considered very conventionally attractive: his brown hair was cropped in a military style, his face was clean-shaven with a firm jawline, and his body was muscular from years of constant exercise. Tonight he only wore a set of basketball shorts and a t-shirt. The sight of his well-defined pecs made Tracy’s body feel… interesting.

Ethan looked over to see his wife, his brow furrowing a bit. She could tell he thought she looked different, but thankfully he wasn’t looking too hard. After all, surely she hadn’t packed on extra weight in the time it took for one shower. Without saying a word, he went back to watching his game.

“I’m sorry about that whole argument, by the way.” Tracy said, doing her best to fall back into her usual way of speaking. “Will you forgive me?”

“Yeah, whatever.” Ethan grumbled, not bothering to even look at his wife. It’s clear he didn’t much want to talk.

Tracy frowned a little. It looked like she would have to get things done the hard way. Walking over to the kitchen, Tracy threw open the refrigerator. She retrieved something he drank often, opening the bottle. She put it to her lips, but rather than drinking from it, she spat out a single thick globule of green slime. It went dropped into the beer, sitting for a moment atop the liquid. The brunette woman smiled as she saw it slowly dissolve into the mix.

Tracy brought the beer over to the couch, sitting close to her husband. “Can I make it up to you?” She asked innocently, holding it up to him. Ethan was never one to refuse a beer. He took it gladly, not noticing his wife’s sly smile.

Though she appeared to be doing her best to try and pay attention to the game, in reality Tracy was keeping an eye on her husband as he drank. Perhaps he noticed the taste was slightly different, but it didn’t stop him from downing half the bottle in about a minute.

Tracy decided to test the waters a little. “You should finish the rest of that bottle.” She suggested. Ethan wasted no time in doing so, downing the rest in one gulp.

The brunette smirked and inched a little closer to her husband. “I just want to be a good wife to my husband.” She said, placing her hand on his lap. “Do you believe me?”

By now Ethan had ingested more than enough of the slime to influence his mind. He cleared his throat and shifted a little bit uncomfortably. Tracy saw something start to harden underneath his basketball shorts. “Uh, yeah, I guess so.” He said. “Sorry, what?” His attention was finally brought over to what Tracy was saying.

“I said, I just want to be a good wife.” Tracy said, her hand wandering up and under the waistband of his shorts. Her fingers found what they were looking for. “Will you be a good husband?” She asked, looking up to him expectantly.

The slime was familiar with aliens that used sex for pleasure. It had once used this to its advantage, infiltrating the harem of the King of the Memnonians. So when it came to using its body’s infiltrating and mind-controlling abilities for seduction, it was experienced. Only minutes after flooding itself into Tracy’s body, the slime threw back her hair and groaned in her voice as she sank down onto Ethan’s cock.

“Holy fuck baby, you feel good!” Ethan grunted in surprise. He laid back further on the couch as his wife tossed her discarded shorts onto the floor. “You’re so goddamn wet!”

“Wet for you, baby.” Tracy replied confidently. If only he knew how wet she really was.

The slime was surprised at how responsive these human bodies were. Fireworks were going off in her mind as she started to grind on Ethan’s erection, feeling it sink deep inside her. Tracy’s muscle memory guided her. She continued to ride him, setting up a tempo as she bounced.

“Jesus, you’re fucking great!” Ethan exclaimed. He eagerly snuck his hands under Tracy’s shirt, fondling her breasts. Tracy bit her lip as she felt his fingers run over her nipples. She hooked her hands under her shirt, taking it off and tossing it aside as well.

The pleasure in her body was building to a peak, increasing bit by bit every time his rock-hard erection parted her walls. Tracy moaned uncontrollably, shocked at how intense the sensations had become. She was now fucking her husband for the sheer animalistic eroticism of it all more than anything else. “Fuck, this is so good!” She cried out.

Ethan started to match his wife’s movements, thrusting upwards as she bounced. He was loving how tight his wife was, and forgot all about why he was neglecting her beforehand. Now there was just the pair of breasts heaving in front of him, and the woman he had been cheating on for a month riding him like there was no tomorrow.

They both reached climax at the same time. Tracy’s pussy clamped down on his dick just as it exploded into her, their screams of pleasure joining together and ringing through the empty house. The couple sat there in shared ecstasy for a few moments, their slightly sweaty bodies catching their breath.

“That… that was…” Ethan tried to whisper.

“Incredible.” Tracy concluded honestly. She was shocked by the potency of the human orgasm, stronger than anything the slime had ever experienced. It wasn’t until the pleasure had finally faded that she realized she could feel more than just a bit of Ethan’s seed leaking out of her. A small amount of slime was trickling from her pussy and down Ethan’s softening dick. The slime must have lost cohesion in the heat of the moment. Tracy leaned in to kiss Ethan, willing the green substance to run back up inside of her before he noticed.

“Sorry I, uh, haven’t been paying attention to you.” Ethan apologized. “If we keep fucking like that, I can promise I’ll pay attention more often.”

Tracy smiled. “Good enough.” She said, climbing back up off his cock and gasping a little as it slid out of her. She sat back naked on the couch next to her husband, twirling a bit of hair in her finger. But it wasn’t just physical pleasure she now felt. She felt almost a little rejuvenated from the fornication, as though she were more powerful. Looking down to her pussy, still soaking wet in juices, she realized that no more of Ethan’s sperm was coming out of her cunt.

“My species’ reproduction process must already be underway.” The slime thought to itself while the two nude humans laid silently by one another. “Human DNA must bond with us very easily. By morning, my slime will be doubled in volume.” Tracy looked down to her own body, slightly thicker from the slime’s invasion in the shower. It would look much more obvious that something was different about her tomorrow— she would either need to split herself, or vacate this host entirely.

Tracy looked over to her husband. He would definitely be the easier candidate, if the slime had just as easy a time moving into males. Or the slime could stay in Tracy, and see if an even better option presented itself.