Back to the firehouse

It was early as Derek quietly entered the firehouse. He was hoping nobody was around as he quickly headed upstairs to the laboratory.

The wooden stairs creaked under his feet so he tried to be as quiet as possible as he headed up and looked around, not seeing anyone before he breathed a sigh of relief.

He approached the counter when he heard: "Derek?"

"Holy shit!" He yelled, jumping and turning to see Karen standing there in just a button-up shirt and panties, holding a cup of coffee with a confused look on her face. "Karen? What the Hell are you doing here so early?"

"I had the morning shift, so I just crashed here. But what are you doing here?"

"I um..... I had to run some tests," he said, feeling embarrassed before he felt his cock twitch in his pants. "No, not right now!"

"Dude, are you okay?" She asked as she grabbed some jogging pants and slid them on.

"Uh, yeah, just um....." he said as his cock got erect and twitched again.

Karen's eyes widened, seeing the movement in his pants. "What the fuck?"

"That ghost..... from the club, it's still....... it's inside me."

"Wait, for real?" She said with an excited look in her eyes. "You dick is possessed?"

"Fuck...... I gotta get it out, but I don't know how."

"Have you tried....... jerking him out?" She said with a chuckle.

"I have, twice, and there is a lot of slime, but it's still in there. Help me, please!"

"I'm sorry, this is just funny, but also mrssed up. I'll help you out though."

"Thanks. I have a sample of the slime. I was hoping we could put it through the scanner."

"Let me see," she said taking the bottle. "This doesn't look like normal ectoplasm," she said getting a closer look at it before she saw his cock twitch again. "Why don't you sit down and relax before you pop," she said before taking the sample over to one of the many machines.

Derek sat down, feeling embarrassed at what was happening to him and worst of all, Karen finding out about it. As much as they liked to bust each other's balls, she was a great Ghostbuster, and he even had a tiny crush on her as well, which he never brought up for many reasons.

"What the...... I haven't seen one of these before," Karen said looking at the readings. "Maybe there is something in the old files."

"I can't imagine there have been a lot of penises possessed by ghosts, making them cum slime."

"Wait, did you jerk off, or did it make you cum?"

"Both, the second time, I was asleep, dreaming about..... strippers," he said as Karen chuckled a bit. "Then I was awakened by my penis going nuts and making me cum, very hard."

"Wow," Karen said, blushing a little. "Ahem, well, let's see what we can find here. I know back in the 80's, two people were possessed by demons and fucked to open a portal for Gozer. Also, there was a rumor of a ghost in an old fort upstate that liked to give people blowjobs, so let's see what else........."

Derek suddenly felt a strange sensation and a disgusting squishing sound coming from between his legs. "Oh shit!"

"What?" Karen asked, turning towards him and seeing a lot of movement in his pants.

Soon Derek's belt began to loosen on its own before his pants unzipped themselves and slid off him, sending his boots flying as he sat there just wearing a shirt and underwear.

"Shit, you gotta get out of here Karen, this is gonna get messy!"

"No, this is good, maybe we can find a way to......." she stopped as a few of the buttons on her shirt suddenly came undone before her shirt just flew open. "Oh, shit..... um," she said holding her shirt closed as she wasn't wearing a bra. "What's happening?"

"Oh God, you gotta go. I don't know what it will do to you."

Karen felt her pants get pulled around her ankles before she bent over and pulled them back up. The two doors to the other rooms slammed shut behind her, and she quickly realized that whatever was possessing Derek's penis, didn't want her to leave.

"Oh fuck!" Derek said as his underwear went flying off of him as well and his cock stood fully erect, but growing large as the veins turned green.

Karen stood there, blushing a little. "Fuck, am I really going to let this happen?" She said to herself as she felt a tug on her pants again.