Extremely amused with the way Severus handled her with care, and his awkwardness at being hugged in the first place, she didn't let that stop her. She had always been affectionate with her friends, and Severus would be no exception.
The Headmaster's Office hadn't changed much from her time at the school, a few more portraits on the wall, a few different artifacts, but still the same sense of excitement and mystery. With, of course, Severus' distinct flare for the dramatic.
"Side-Along sounds perfect," She said, placing her hand in Severus'. She trusted him to know what was best in a situation like this. She had no real experience with the detection of Dark Arts. Fighting against them, yes, but testing them? That she would leave to Severus.