Everyone explodes

The women got louder and more passionate, and Peter decided he didn't need a wet spot in his costume. He glanced around to make sure no one could see him, and quietly chuckled to remember he was eight stories up in the dark. He pulled his costume pants and boxer shorts down, revealing his thick cock to the cool night air.

The groaning and naked flesh kept Spiderman jerking on his cock. A hint of guilt crossed his mind, but he thrust it aside, since he wasn't hurting anybody. He shifted to get a better view of the tryst. He now faced the window, legs on either side of the frame, one hand above, and one hand rubbing himself.

The lesbians reached a crescendo, first one and then the other shouting out in orgasm, their bodies quaking in the dim light. "I'm coming, Janet. I love you!"

"I love you too, TJ."

Peter couldn't take it anymore. His cock erupted in ecstasy. The reaction was different than before. His cum shot out of his cock in a long strand like his webbing, through the open window. The strand hit the uppermost woman on the ass cheek. Peter was scared that he had given himself away.