Inspired by @ellaphant_, who made a cute suggestion that I changed a little. :)
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A: "It's a bit cramped in here."
E: "I'll push you out if you keep complaining."
A: "But it is!"
E: "Aeryn, we have found possibly the most high-tech tree house in existence, it has a detachable roof!"
A: "So?"
E: "It has all this and you're complaining that there isn't enough room?"
A: "...yes."
E: "Here, I'll move over a bit..."
A: "Better, I guess. But if we're sleeping in here we're going to end up moving around a bit."
E: "I don't care, you're the one that's complaining about everything."
A: "Sorry. Um, it's a bit cold."
E: "Arghh. Okay, come here."
A: "Mmm, that's better."
E: "You're like a cuddly little kitten, Aeryn."
A: "Thanks, I guess?"
E: "Hey, look up, there's so many stars! See if you can find any shapes!"
A: "Um, I see, aww, I can see a heart."
E: "Where?"
A: "There!"
E: "I see!"
A: "Maybe that's the constellation for love?"
E: "I don't think that's how constellations work."
A: "Spoilsport."
E: "..."
A: "Eli, what does it feel like to be in love?"
E: "I - um - I don't really know, er-"
A: "Oh."
E: "I guess it would be...warm and comfortable. You'd feel...safe with that person, together you'd be untouchable. You'd trust them completely...butterflies and all that."
A: "Oh."
E: "I don't really know though, that might just be-"
A: "That sounds nice."
E: "Yeah."