Sexually Fantasize About Spider-Man

It started small.

Spider-Man swung by the Baxter Building to consult Reed about a sonic disruptor that would detect symbiotes disguised as regular clothing or costumes. Sue Storm waved at him as he headed for the lab, and he waved back—but she noticed, in a way perhaps she had not allowed herself before, an admiring glance at that perfectly toned ass that the nearly skin-tight fabric seemed to highlight rather than hide.

Maybe it was just impulse that made her go invisible and silently follow him into the other room. Where she listened and heard the real reason for Spider-Man's visit.

"I'm worried that the symbiote may have left traces in my sperm," Spider-Man said. "You know how weird my relationship with Mary Jane has been lately, and...well, I just want to make sure it doesn't pass down the gene line."

"I understand," Reed said solemnly. "I have a new nanite solution designed for detecting Skrull infiltrators. However, it will require a sperm sample."

Mister Fantastic's arm stretched out and he retrieved a plastic cup from a cabinet, handing it to Spider-Man.

"There's a private restroom over there," Reed said. "Do you require any pornographic material or—"

"Ah—no, no, I think I've got a good mental image to focus on. Thanks, Reed. Be back in a few minutes."

Sue Storm froze where she was. She watched Spider-Man walk into the bathroom. With her powers, she could have beaten him there. Hid there. Saw him pull his pants down and stroke himself—

But no. She was a heroine, not a peeper! She wouldn't invade Peter Parker's privacy any more than she already had.

What she would do was think a lot about that. Spider-Man in the Baxter Building. Masturbating into a cup. Eyes closed, thinking of something. Who? Mary Jane? Or Maybe...

Could he be jerking off to me? Sue wondered later, in bed. Dressed in only an oversized Fantastic Four t-shirt. Her hand slid between her thighs as she pursued that fantasy. Sex would be cheating on Mary Jane, but what if I helped him? Posed a little? Let him rub one out, thinking of me? Or used an invisible **** field to jerk that stiff spider-cock...

It was only a fantasy. A passing whim. One that slipped into her dreams and came up in odd moments throughout the week. She wondered what Dr. Stone would make of that.