He does something drastic

Only one option. I didn't like it, but it was my only one.

I grabbed at the sleeve covering my dick, and pulled.

The anti-tamper mechanism kicked in immediately, sending a jolt of electricity through my lower body that made me spasm and threw both of us to the floor. As the sleeve began to squeeze my nuts and cock (which is MUCH more painful when you have an erection, trust me), I felt Steve stand up, obviously concerned. And I screamed.

Steve had been so close to cumming, and the vibrations of my agonized wailing tipped him over the edge. With a groan of his own, he started spurting cum all over my flailing body. Through waves of nausea, I heard Nikki comment, "Well, I guess we can write off that rug. Dave, when you can get up, go to the bathroom -- the nice bathroom, not the small bathroom -- and grab the red bag on the sink for me. You can wash up, but don't take too long."

I went. I wanted to be as far from Nikki as possible.

Our house had been advertised to us as having two bathrooms, but we only really used the nice bathroom. It was spacious, easy to clean, and had one of those baths with jets in it. The small bathroom, I was pretty sure had once been a closet. The tiles and sink were chipped, you practically had to sit on the toilet to use said sink, and it was so small that if you used the shower (which had absolutely terrible water pressure and wouldn't go above room temperature even with the hot tap on all the way), it wet everything in the whole room.

I went to the nice bathroom and took a piss. There turned out to be a tiny hole in the end of the cocksleeve, which explained how Steve's cum had gotten out. I immediately jumped into a scalding hot shower to wash the mess off -- fuck Nikki and her 'don't take too long' -- and tried to sort things out.

So.

Basically, I was fucked.

When Nikki decided to give up on this stupid housewarming prank -- and that would have to be soon; we had classes in a few days -- I was never going to be able to look Steve in the eyes again. Which would be super awkward, if we were sharing a house. he was going to have to move out; this was going to ruin our whole friendship. God, what a bitch.

I felt a sudden increase of stimulation on my cock. And heard it -- Steve was screaming.

I barely stopped to turn the water off. Jumping out, I snatched up the bag and bolted for the lounge. Whatever Nikki was doing, maybe I could stop it. Maybe I could distract her.

By the time I got back, dripping water everywhere, she was dragging his mostly limp body over the back of the couch. He looked up at me, tears in his eyes. Ah. He must have fought her, or refused to bend over the couch, and she'd shocked him.

"Thank you, Dave," she said, taking the bag from me. "Weird choice, not drying yourself off, but if you want to shiver your ass off that's up to you. No, don't leave. You're back here now; we all have to deal with our choices." Out of the bag, she pulled a massive dildo. I'm not great at size, but it was bigger than my dick, and I'm definitely not small.

"You're going to want to relax, if you can," she advised Steve as she liberally coated it from a small bottle of lube. "I've never done this before, and I don't want to cause permanent damage."

I felt for my friend, sobbing and moaning as the thick dong went into his ass. But I was also annoyed, because with every sob, I felt a mouth clench tantalisingly around my dick. Now that the pain of the anti-tamper mechanism had faded, his mouth was making me excited again.

"There," Nikki said. "That wasn't so hard, was it? Now, sit on the couch, both of you." She pulled something else out of her bag -- two small clamps with little hooks attached.

"Don't worry," she said soothingly. "We won't be adding any weights to these today. Plenty of time for that later." Then she clipped them onto Steve's nipples. He shrieked.

I couldn't help but notice that, in spite of his tears and obvious pain, Steve already had another raging hard-on.

"There," Nikki said. "By the way, I'm instituting a new household bedtime. You boys are going to bed at 10pm; I'll remove your toys then. Until then, don't get up; you'll break my concentration. Enjoy your football game."

Then, without another word, she went back to her computer.

I shivered in the cold air, wishing I'd taken the time to towel off after my shower, and glanced at the clock. It was seven thirty.