Guilt plagued Hermione every single second that she was awake and the emotion colored her dreams as she slept. She believed that the reason she was no longer content to stay with Draco and why she wasn't rushing to escalate their physical relationship again was because of that wretched emotion that consumed her. She felt guilt that she was essentially living with a man who wasn't her husband. Guilt because she fought against her old friends for so many years. Guilt because she didn't feel guilty about making the hard choices that allowed her to survive. Guilt because she was a terrible mother. Guilt because she'd been an even worse wife. If she allowed herself, she could sit in a puddle of guilt for the rest of her life and never find the way out. It was why she couldn't always focus when she was around Draco, why she dwelled on him when she wasn't near him. The biggest source of her present guilt came from protecting the wizard and actually seeking out his company.