Marietta did not believe Bellatrix to be innocent. If Bellatrix Lestrange was not a murderer and a Death Eater, then Marietta was a virgin and pure as the driven snow. She was, however, not foolish enough to let it show on her features. There really wasn’t any reason for her to be there unless she was up to something. Obviously if she was looking for Umbridge then had something in mind. A part of her wished she’d allowed herself to slip off home instead of staying late now. If she screamed no one would hear her. The Ministry security obviously didn’t have much concern for the night staff if a Lestrange could roam the halls freely.
"I am just finishing up some last minute things,” she explained straightening papers. She could only imagine what having a list of names and addresses for every muggleborn might would do for a Death Eater. As much as she detested them, she didn’t much want to pass over that sort of thing. Her hand rested more firmly over her paperwork on instinct. “It’s my job to make sure everything is in order. I wouldn’t want anything to be out of line. I’m certain I’m missed at home though.”
There was a picture of her and Padrig on her desk. When they took the picture it had been civilized but most of the time the picture forms of themselves took to playing kissy-face or Padrig playing with her hair. It was embarrassing sometimes when people came over and took notice of it. She tried to maintain this professional image and that made her look more like a school girl with her first boyfriend. When it caught her eye she was tempted to move it away so Bellatrix wouldn’t take notice of it. Her cheeks flushed at the sight of it. Dammit! Padrig must you be so damned romantic in the fucking photo frame.
She aimed to distract with words instead. “Oh, Delores was in dreadful need of sleep! I told her that she really ought to go home and refresh herself. She’s too delicate to have to stay late. There wasn’t much need when she has an assistant like me. Would you like me to pass a message on to her? I’d be much obliged.”