"That smile!" Rose suddenly said to herself, not caring that half the people in the café had turned to watch her after her sudden outburst, "of course…" she said, reaching up to touch her lips. She smiled under her fingers. The man in her memories hadn't been replaced. Her love for him had simply grown. Rose smiled even wider when she realized the Doctor had come to see her in the past in the future—after they'd been separated—to let her know he cared. To let her know he loved her just as much as she loved him. He loved her enough to risk a time paradox or a rift-- he loved her enough to risk the entire universe. There was no other explanation for why he would have come to see her in the past in what was obviously his new regeneration. If she didn't know who he was, there was less of a risk. And it was while she was thinking of this new regeneration that she began to outright laugh. She turned to the person sitting at the table next to her who as of a few minutes ago had been watching her cry and was now carefully positioning himself between her and the young child he had sitting next to him.
"It was ginger!" she laughed.
"What was? Do you need help ma'am?" he replied, clearly wary of her erratic behavior.
"His hair! His hair was GINGER! And it was fantastic. I'm fantastic! We're all fantastic. Fantastically alive," she shouted and then jumped out her seat, dropped a fiver on the table, gave the terrified man a quick hug and ran out into the rain, splashing in puddles as she made her way home to see her ever-patient family.