Peter starts by touching Cap’s biceps. Both biceps immediately begin swelling, getting bigger each second. Even when not flexed, the biceps and arms are massive, and Peter stops once Cap’s biceps are as big as his own head. Those freedom guns will surely reach above his head when flexed.
Then he moves to his neck and pecs, swellling bigger and bigger…Steve moans in his sleep as the hyper neck muscles and pecs begin surrounding his head before he stops. After the massive growth, Peter notices Steve’s nipple are very small. So he carefully grows them. To make sure they’re big enough, Peter gently grabs a handful of both nipples. Playtime will come later, Peter thinks to himself. He must make this monster grow before hew wakes up.
Going down the length of each leg, the flesh bubbles as the legs grow into lovely, thick and wide pillars that look like they can easily crush metal. Thankfully peter didn’t have to risk the cost of his own hands to get to America’s ass, it had already swollen with size to be a juicy, thick, squishy pair of cheeks making a lovely hyper bubble butt.
Finally, the best part: the manhood. Peter gently grasps the dick, jacking off Steve as the dick grows. The dick rose straight up as it grew. Veins thicken, the shaft wides, lengthens. Peter didn’t realize how much fun he had with he dick alone until he looked up and saw the dick was as wide as he is tall, and any more growth would make it burst through his house’s roof! Peter feels his own webshooter leaking as he adds the finishing touch: the nuts.
Peter watches as the balls inflate in his hands. As they got to the size of watermelons, he could hear the balls gurgle and slosh, full or super soldier seed.
Steve began waking up, only seeing a giant shaft blocking his view and giant pecs. He looked up, seeing his own dick and getting a little light headed from all the blood flowing through his love organ.
“Boy! Wh-what are you doing to me- Ohhhhhhhh…..”
But he didn’t let Steve waking up stop him. He made sure those balls were as big as a large as a wrecking ball. Smiling, he made sure those balls would touch the ground while Steve is standing, making them roughly 1/4 of Steve’s own body size! Steve’s massive, veiny, monster cock was leaking lots of pre and was rock hard. Rolling his eyes to the back of his head and moaning light-headed Steve feels his dick leak thick, sticky precum. Blushing hard red as Peter’s spider suit, he pushes his erection down. The dick only springs back up with the leaking head slapping him in the face! The slap makes Steve grunt and fall on his ass, cushioned by his big ass and his giant balls,
Peter was then in for a big surprise when Steve stood up and shows his height in that instant. He is now standing at roughly 10 feet tall, and somehow isn’t wrecking the place with his size.
The thought of his grown body made Steve forget that his orders to pick up Peter and take him to Xavier Institutes was the #1 priority. Instead it brainwashed him to a new #1 priority:
Protect his new boyfriend and grow.
Steve moans, his voice gotten a lot deeper. Seeing Steves sexy situation, he gets even more surprised when he hears Steve’s deep voice.
“Uhhhm, mmmmm……. Uh, boy….What was your name again?” The giant captain asks, reaching his giant arm and hand out to offer a handshake.
“Uhh, Peter. Parker. I see you like my powers?” Peter asks.
“Damn right I do, Master~” The giant takes Peter’s hand with surprising gentleness, making sure not to crush Peter’s tiny hand. Peter paused when he heard “Master.” He could only dream of even meeting and being escorted by Captain America. But GROWING and SEDUCING him?! This was great! Perhaps my powers aren’t useless, Peter thought to himself.
Steve grunts as he pushes his cock to the side so he can see Peter.
“Master, we still have the option of going to Xavier Institutes. Do you want to go there and learn more about your powers, or have me stay here with you~?”
“Hmm….” Peter thought to himself on this big decision. “I say that we…”