Stifling her tears before they became full-fledged sobs, lest she risk attracting unwanted attention, Reinette ran a trembling hand through the Time Lord's hair then leaned forward and, uncaring of the blood, pressed a tender kiss to his forehead. "Godspeed, my angel," she whispered softly before rising slowly to her feet. Turning to leave, she paused and looked back. Despite her grief and anger, her shock and devastation, Reinette knew she had to keep her head about her. She had to leave him there. She couldn't carry him off. However she did have enough foresight to reach into his trouser pocket and pull out his beloved sonic screwdriver. She didn't think he'd want just anyone coming across it and she knew, somewhere in the back of her grief-stricken mind, that having it might come in handy. She hated thinking that way but survival was of the utmost importance now, if only because that's what the Doctor would have wanted, and so she took the screwdriver without another thought on the matter. Then she calmly turned on her heel and slowly made her way back to the apartment buildings, completely uncaring of the tears that streaked her cheeks or the dark, somewhat orange-tinted blood that had seeped into her clothing and coated her hands and forearms.
As she reached the flat once more, Reinette numbly stepped inside and headed for his room. She spotted Lucy on the sofa, a book open in her lap. Their eyes met, Lucy paling at the sight of her and rising partially out of alarm, but Reinette simply shook her head. "I will be leaving now. Thank you for your hospitality," she informed the woman in a tone that she had to force not to waver with emotion. Her eyes, however, shone brightly with the pain that had seized control of her heart. She didn't mention the Doctor but simply turned on her heel and made her way into the bedroom that contained his TARDIS. Once inside, she knew the emergency programme would take her to Amy, Rory, and their newborn, and then to Vincent. All would be given the same option: join her, where it was safe, or take their chances with the invasion.
As for Reinette... well, she couldn't bring herself to care about her own safety at the moment but knew she'd stay alive. It was, after all, what he would have wanted.