Her brown eyes stared straight at him. She was waiting for an answer to her question. A question that she has been wondering since that time, long ago on the same beach. Her heart yearned to know what he was going to say.
Now, they were standing there waiting for him to answer. His clone looking at her the same way he does. He wanted to tell her. He wanted her to know that HE loved her, but he knew what would happen if he did tell her.
The best thing for her was to be with him; even though it kills him inside. She would be happy, she would be with her family, and he would be there for her and be able to live a life with her. He couldn't do that. He was a Timelord. She would die and he would have to move on.
He took a deep breath and spoke. "Does it need staying?"
His hearts were breaking as she turned to his clone and asked the same question, but he could give her the right answer. The answer she wanted. He leaned down and whispered those words he been wanting to say to her. She then pulled his clone and kissed him.
He wanted to look away, he wanted to push the other aside and kiss her, but he just stood there. Trying not show the pain he was feeling. He turned to look away and walk back to the TARDIS. He wanted to look back, but he couldn't. If he did, he could never leave her. This is the best way for her. It was all for her.