Mercedes looks unsettled and blushes at the generous yet deserved compliment. Describe how the narrator describes Mercedes' body and reactions in this sentence.

Mercedes' body tenses slightly, her cheeks flushing a deep shade of pink as she shifts uncomfortably in her seat. Her eyes dart nervously around the room, unable to meet the gaze of the person who just paid her such a kind compliment. The subtle quiver in her voice betrays her unease, despite the genuine smile that tugs at the corners of her lips.

The narrator does not describe Mercedes' body or reactions in the provided sentence.