Slighty more angry than amused....

"Is this how it's going to be now?" There's an edge to Jenna's voice as she regards you both with a displeased expression. Her arms are crossed under her breasts, making them even more prominent than usual. "I mean....last night was fun... but I didn't think I was signing up for a free-for-all."
"Jenna, it's my fault." Zoe quickly crosses over to Jenna, grabbing her hands. "I couldn't help myself. Please don't be mad at James."
"Oh? And is he just a dick attached to meat? He has no control over himself?" She looks at you over Zoe's shoulder, still annoyed.
"No. I'm sorry, Jenna. I guess....we all should have done a better job establishing.... what's kosher now." you know that's not a great excuse.
Zoe's rubbing Jenna's arms and making soothing apologies, and after a second, Jenna's face relaxes. "Look... I'm not opposed to a polyamorous arrangement, we just didn't talk about it and you guys just...assumed..."
"You're totally right." You nod. "We fucked up."
"I forgive you....jerk." she beckons you over, and she's started grabbing Zoe's big ass idly. You kiss, but when you break away, she bites your bottom lip hard enough to draw blood.
"AH!" you taste blood as you recoil, but then you just nod. "Okay...fair."