It was very much as though Bragi heard her thoughts, and accepted the challenge of trying to catch the look in her eyes. He looked at her, through the distance and the moss and the netting, and he smiled, and Idun felt exposed. Even if that hadn't happened, his reply would've done the trick. Very suddenly, Idun felt bare. She felt vulnerable and uncertain. Bragi was playing a beautiful song that invited her to dance in a pit of snakes. She felt threatened even though there was no proof any of them were dangerous. It was an assumption, and because of it, she couldn't dance freely, couldn't say what she wanted to. And that was terrible. Wasn't it a trap, after all, for him to say his relationship wouldn't be much of one then? Bragi might not have set it intentionally, but it was still there.
Idun wanted to poke at the trap, see if she could move around it without snapping it shut around her ankle. But there was a pit, and snakes, and jumping at the notion that maybe, just maybe, his relationship wasn't all that solid, well, that wasn't allowed now was it? Idun was tempted, and curious, and truly hopeful, and perhaps that brightened her expression just a tiny bit, but she was forced to draw all that back in so she wasn't beaming at the prospect of Bragi's great love falling apart.
To keep things simple, and safe more importantly, Idun just smiled back at him. And then she nodded, because yes, the letter should stay just as it was. It truly pained her to believe that, but she couldn't offer terrible advice here. Bragi was just too good at what he did, he'd captured her with words that weren't even meant for her, and Idun told herself that had been his point all along. Somehow, that had been his plan. "In the future, try not to be so candid, though. Emotions don't always translate well in letters," she offered. It was awful advice, but that seemed to balance things in her head. A tiny bit. Future letters might not be as beautiful if he listened to her now.
The business about the giant was getting a bit more worrisome as Bragi explained himself. He made sense, like he always made sense, and Idun found herself nibbling on her lower lip nervously before she was struck with a bit of odd, inappropriate curiosity. A frost giant might be on the way right this moment, coming to collect her for a meal, and she wasn't demanding he let her down! Oh, this was Bragi's fault as well. Somehow. "...so...would you let a frost giant get me? I mean, would that bother you at all?"