Dr. Nicholas was interested in you, it may be from how lonely he's been or how touch-starved he is, but he couldn't help but notice the pull he feels towards you. Of course he kept his distance from you, he didn't want you realizing that he was watching you take the tapes he's been lying around to keep up with the dates, but he also didn't want the baby to notice his presence either, but he had a feeling he already knew.