You invite some more participants

You see no reason to disappoint a lady so you reach out with your mind and send out a summons throughout the tower.

You spend the next few minutes washing which mostly consists of soaping up your dick while you watch the two beautiful redheads shower. Thanks to some mental leakage both Natasha and Mary-Jane start to pay particular attention to their breasts. You grin as Mary-Jane decides that the only way to really ensure her large nipples are clean is to thoroughly scour them with her tongue. Soon there are some loud smacking sounds as she sucks at her teat, both hands holding the large elongated tit to her pursed lips. Releasing it she happens to look over at you, her gaze going right to your crotch. Her eyes widen, not that she finds anything strange about you having an erection…

“Wow! What a HUGE cock! That’s crazy-big!” She turned to Natasha, “What do you think?”

The other redhead is slow in looking but she does eventually, smirking a little bit as she eyes your hand stroking up and down your length, she admits, “It’s pretty big.”

MJ scoffs, “Pretty big? That’s like the biggest dick I’ve ever seen and that’s not in person, that’s like in porn too!”

Just then, a fully nude Captain America walks in. He looks distinctly uncomfortable as he greets you all and proceeds to move towards a separate shower head, his eyes carefully off of the women. You’re a bit self-conscious, because he’s a walking wall of muscle and you’re decidedly not.

Natasha calls out teasingly, “Why you being a stranger, Cap? Come join us.”

MJ is pretty enthused about this as she continues to ogle his muscular form, “Yea! Come on! We’re having a little contest to see who has the best penis!”

Steve’s cheeks are a bit red but he relents and walks over, his back ramrod straight. He doesn’t quite look at your crotch as he calmly replies, “I think I’ll concede.”

MJ isn’t having it, “Oh no you don’t, Mr!” She steps over to him and promptly grabs his soft dick and balls in one hand, starting to softly massage his whole package, “Just have to wake’em up!”

It isn’t long before he’s hard though the guy continues to look vaguely embarrassed as Mary-Jane gives him a hand job and Natasha watches with this thoroughly amused expression. You feel a little weird stroking your dick with everyone paying attention to him so Black-Widow starts to take over for you.

MJ stops stroking him long enough to look at it and declare, “Nice. Like eight inches, right?”

He gives her an odd look, “I have no idea.”

Natasha asks him, “So… did it get bigger when they gave you the Serum?”

He sort of glares at her, but admits, “Yes.”

“Anyway.” Says MJ, “It’s a great dick, got my hubby beat too, but this guy-“ she reaches over to pat your cock, “-is definitely the best. Longer and a lot thicker.”

Black-Widow shakes her head, “Best? There’s a such a thing as too big, you know. I think Cap is in the sweet spot.”

“Whatever.” Replies Mary-Jane before her free hand snakes out and snatches your cock, “Need to do a proper comparison anyway.” She squats down before you both and proceeds to stroke your cocks in time for a bit before she lifts them and turns them this way and that as she examines them.

Finally she declares, “Steve, you have a really nice dick. Like the second best one I’ve seen in person.” She looks at you with a smile, “You win, hun!”

You are about to open your mouth to ask what you win when Natasha interjects, “Now hold on. Don’t you think there’s more to test? How about staying power?” She languidly steps around your back to come up between both of you, her hands slipping down to grab yours and Captain America’s cocks. You immediately gasp as her slow confident stoke is quite good and you have to hiss as she reaches your cockhead and her thumb oh so lightly strokes the flare as her index finger tickles the underside. Steve grunts appreciatively despite himself as she does the same trick to him.

Natasha’s hand job is incredible, her skill with just her hands and fingers is undeniable but it is also frustrating as she stands there with this amused expression for you both. She completely controls the pace, controls you both, and wants you to know it.

So, of course, you take back control with a flick of your mind. Your power penetrates Black-Widow’s mind and it parts and yields to you like soft wet pussy.

Her hands stop their movements but take a firm grip at the base of your cocks. That same strong self-possession is present in her face as she looks back and forth between you. Then she looks at MJ, “I think we’re going to need a better… deeper test for these boys. What do you think, red?”

MJ’s smile is wide, her teeth shining as she picks up on Black Widow’s hint, your power easing things, “Why- red, I do think you’re right!” She steps up and drapes her busty curves against your side, one hand resting on your chest, “Shall we?”

Scarlet shakes her hand and gently but firmly takes MJ and directs her into Steve’s arms, “He’s mine.”

MJ screws up her face in a cute pout but she soon is distracted by Captain America’s hard body and she turns to him, her hands running up and down his rather large muscles.

You wrap your hands around Natasha, squeezing her sexy ass as her hands take your member, “I thought I was too big?”

She smirks, “I like a challenge.” Then she flips you around so that you’re pressed against the wall, then she grabs your shoulders and pulls herself up and onto your cock. You groan and close your eyes as wet searing warmth engulfs your length.

To the side MJ is bending over and Captain America is positioning himself behind her, your power whipping his brain into acceptance and even excitement at the situation.

There’s a booming exclamation from the entrance and you all freeze long enough to see a fully nude Thor standing at the entrance, a similarly naked Jane Foster in his arms, looking decidedly small against his huge frame, “Huzzah! Now this is a celebration fit for Valhalla! Let us join together and be merry!”