Thranduil's parting only intensifies the guilty look Beleth is now sporting, like a child caught with her hand in the cookie jar. Or caught plotting an elven conspiracy. As you do. He doesn't seem to disapprove, and she trusts that he won't take the news to anyone who would create issues in regard to it. But for her, specifically, it seems to be a cue that this is not the place that she should be.

Nerves already on edge, Beleth can't help but stiffen when Myr speaks to her. It could be nothing, but that voice in the back of her head assures her that it is definitely not nothing, that it's going to be something unpleasant, him picking and poking at her about some flaw.

As tempting as it is to try to avoid whatever criticism she's accrued, Myr probably deserves to tell her off for it. Whatever it is. "Do you want to speak right now, or privately? Either way--I'm listening."