Nicole's a big girl, and you don't want Miranda to stop.

"Hell no..." you reach down to lace your fingers in her brown hair, just as you've always wanted to. Nicole is a big girl, she doesn't need you to babysit her. Miranda smiles.
"Good... because I was enjoying your cock..." she gets back to it, and you let your mind drift as the pleasure radiates from your cock throughout your body. She's really talented. She makes very pleasant slurping and gulping noises as she works, and when she goes deep, you use your gentle grip on her hair to help her down until you feel her chin press against your balls in a way that makes your eyes roll back.
"I want you to come for me, John. I want to taste it." Miranda is out of breath, and her eyes are watery, but she's smiling and stroking. She pops your balls in her mouth, sucking gently and then licking the base of your cock while working the ridge of your cock's head with her hand. You feel your balls churning.
"Keep..keep it up and I will..." distantly, you hear water running in the bathroom. You ignore it and grip Miranda's hair a little more firmly, though you are careful not to hurt her. She seems to like it, anyway. Her head bobs furiously on your cock, slurping and drooling and sucking until you can't take it anymore. You hold her head close as you shoot a big fat load into her willing mouth. You're pretty pent up, and she starts coughing and sputtering due to the squirt of cum you just shot into her throat.
"Fuck... sorry."
"Its okay...I asked for it, after all." she says after catching her breath. She plays a little with the cum in her mouth before swallowing. "Not bad. You could use a little more fruit in your diet though."
The door to the kitchen swings open, admitting Nicole. Her face is damp and her hair is wet, and she has a look of conflicted emotions on her face.
"Oh!" Her eyes widen at the scene; your shrinking cock still dripping cum, Miranda obviously on her knees. Tom appears behind her, with a smug look on his face. "See? What did I tell you about experience..." Nicole jumps, and you think Tom pinched her ass. Miranda quickly stands up, giving you a pat on the cheek as she pulls her panties up. "Thanks for your help. I'm going to go see if Sarah is fucking your boyfriend yet." She gives Nicole a smile as she moves past, and Tom gets a smirk and a shove out of the way when he tries to grab her ass. He follows her out, leaving you with Nicole in awkward silence.
"So... wow..." Nicole says. "G-good job!" It's a strange thing to say, but she seems to be having trouble. "I know you've been crushing on her for a while. I can't believe she... outside of a dare!" despite her words, she seems to be talking too fast and too high pitched.
"Are you okay? Did something happen in the bathroom?"
"I'm fine! Tom was actually just.... giving me some advice." You've known your best friend long enough to know when she's lying, but you don't press the issue. You grab two beers and hand her one, which she opens and chugs half of without missing a beat.
"We should get back to the game, yeah?" she's still talking a bit high, but more composed now.
~

You head back to the living room. Tom is sitting in his chair, looking at his phone, while Sarah, Matt and Miranda are coming down the stairs.
"...walked in!" Miranda's voice.
"Oh, poor ba-"Sarah stops talking when they reach the bottom of the stairs, but gives you a congratulatory smile, and Nicole a sympathetic one. Matt is looking quite pleased with himself. You wonder if he and Sarah fucked.

"Are we all rested up? Ready to get back to it?" Sarah nods in satisfaction as she sits on the couch. "Since I'm no longer on Tom's lap, I rule that his no talking dare is done and therefore all girls can go back to their normal seats." She looks around, but no one seems to be objecting. "Good. Now I believe it's Tom's turn. And I also propose that we start doing 'either/or' dares to mix things up. Dare your target two different things, and they get to choose which. It should make for some bolder dares."

"I have no objection!" Nicole takes the seat on the couch closest to Tom's chair, between you and him. Tom grabs the hat.