You thought about who you could infect first, your roommate Steve immediatly came to mind. He was a 5ft10 student who lived with you for almost a year. You always had suspicions about him being gay. You look at the time, it was 2:46AM. You figure that he is probably sleeping at this time. So you absorb the symbiote back inside your body and make a shiny black speedo to cover your huge dick. Except for your size and muscles, you can probably pass as a normal human being. You walk to Steve's bedroom and open the door.
"Huh? Who is this?" Steve says with confusion in his voice as he sees the 7ft tall silhouette enter his room.
You open the light so he can see your familiar face.
"It's just me..." You say to reassure him.
"What the fuck man, you're huge! What happened to you?" His face shows a mixture of confusion and curiosity.
"I got a gift" You say while looking him straight in the eyes.
"And I can give it to you too" You start flexing your muscles for him. He gets up and comes closer, you can feel his interest as he absorbs the sight of your godlike body.
"This is crazy man, can I touch?" He extends his hand to your bicep.
"Go ahead" You flex your arm for him, your flexed bicep is bigger than his head. He grasps it and pull out a soft moan.
"Oh my god, how did you get this? You said you could share your gift" You can spot his dick getting hard in his boxers as he said that.
"Just follow my lead" You then lift him up and kiss him deeply. He moans in surprise but returns the kiss. He is shaking with arousal now. Your symbiote also trembles in excitement "INFECT HIM!" it screams in your mind. This makes you shudder in anticipation also, you wonder what kind of monster he will become. You absorb your black speedo while he his distracted by the kiss and pull his boxers down.
He looks down and sees your massive dick, he pulls out a loud moan.
"Make me cum Steve, and it will turn you like me." You drop him down and let him go wild on your 14 inches monster. He starts sucking the tip and furiously pumping it with his two hands. You moan deeply, your voice dropping deeper as it becomes harder to hide your true nature.
"Hmmmmm don't stop" You flex you biceps for him as as you feel pre building up to your cock.
"Drink it all, let it get deep inside you" You say as you grab him by the back of the head and push it towards you dick. You feel your latex pre comming, you know it's way ticker and a lot more of it will come out compared to normal human pre. Three big spurts shoot out of you and Steve drinks it all like his life depended on it. You can feel your spawn slowly entering his body. "YEEEESSSS" You roar in approval. Steve pulls back and sees dark blue cum ooze down from your dick. Steeve feels like he should be screaming in fear but there's something in him that slowly turns this fear into lust. You reach back to him and kiss him. "Embrace this symbiote growing within you." You can feel Steeve starting to relax again as his symbiote corrupts him. "It will turn you into something better." You then slowly show him your true form. Black latex pushes away from your skin as your moans turn deep and alien. Finally it covers your head and you roar in excitment to your roommate.
"You look so fucking hot like this." Steve says while his dick starts growing. You then drop down on your knees and coil your long tongue around his cock and jerk it off. "HMMMMMM" He loudly moans as it reaches 12 inches long. You then start sucking it completely in your hungry maw.
"HAAAAAAAA DON'T STOP" Steve screams in arousal but you have other plans for him. You pull his dick out of your mouth and see it is now a 16 inches long and 6 inches thick monster. It is now dark blue in color has inhumanly thick black veins all around it. You both moan in approval. You lift him up and kiss him wildly again. He then looks directly into your eyes and says. "I'm ready. Turn me into a fucking beast" Your arousal skyrocket from these words and you sit him on your dick while jerking him off and kissing him. He moans as he is slowly impaled on your monster. You then slam him onto a wall and start fucking him senseless. Heavy thrust after heavy thrust make you too scream in arousal. You see his dark blue skin starting to spread from his cock to his waist as a huge 8 pack explode from him. He looks as wide as your hulking body now. You can hear his moans turning deeper and deeper until you two share a deep alien voice. His pecs then start to grow as the blue skin crawls up to them. They keep growing more and more even surpassing your own. They become as big as beach balls. "MOOOOOORRREEEE" He screams as his arms get thicker, his biceps getting bigger than watermelons. His spine then changes and grows upward, his head reaching higher. You then notice his tongue is now long and forked like a snake. You then see his legs merging together as the blue skin crawls down to his feet. It pushes more and more meat to his snake body until he becomes 20ft long and 4ft wide from where his torso starts. Finally his head completely turns blue as it takes the shape of a cobra's head. "YEEEEESSSSSSSS"
"HAAAAAAAAAAAAAA"
You both scream as you both release your thick alien cum on one another. Spurt after spurt comes out for more then 10 minutes, completely covering the room in alien spunk. After it finally stops he lays down on top of you. "You look wonderful" you say as you eagerly absorb his cum into you. This makes your dick grow even more until it reaches 22 inches. You see Steve absorb your cum which makes his symbiote grow a new pair of buff arms right under his current set. He smiles and kisses his new biceps in approval.
"This feels amazing. We must spread this everywhere" He says as he kisses you wildly again.
"Spread more and grow more" Your dicks ooze cums in anticipation.