Ginny was in a low key state of shock over learning that she had a son in some reality out there, and with Harry no less. Well, she was assuming the father had to be Harry, since with a name like James Sirius, that had Harry's fingerprints all over it. She honestly felt slightly terrible upon learning that where he was from, she would have had him right when her quidditch career was starting to take off. Meaning that she technically wasn't the mother he thought she was. While she should have been elated to realize that she didn't mysteriously forget about having a child, that had to make the poor kid feel rather awkward about things. Hence her wanting to meet him.
Maybe it was the vague sensation if feeling as though she owed it to him to be a part of his life. Or, perhaps it was that odd sense of longing for what could have been. Either way, she wasn't going to pass up the opportunity to learn what she could about what alternate reality her was like. Smiling as she approached him, giving his hand a firm shake, she nodded. "Morning to you as well," she responded. "Well Jamie, I'm not sure what you should call me either. I mean, I don't mind if you call me Ginny or Mum, so whatever you feel is less strange."