Rose seemed to relax when Jenny said that it had just been the Doctor. That was better than the idea of him having a daughter with someone else. She looked up at him when he squeezed her hand and gave him a smile.
Jenny was growing a little more animated now that the Doctor seemed more open to her. Even if it was just curiosity and excitement about the machine. "Yup. Same DNA. Two hearts, and everything." She smiled. "How old? Six months, yesterday!"