The Doctor shook his head. "Shannon won't let him in there. She doesn't trust him." This was stated plainly. It was very clear that she didn't trust Nine as far as she could throw him. As far as Rose went, the Doctor wasn't sure what to expect from Shannon on her behalf. "Though, perhaps Jack might be able to convince her otherwise?" There was a glimmer of hope there. To have Rose there with Jack and Nine would be ideal, not to mention Sarah Jane if she was still staying there.
"Jealous?" Well, didn't that sound like a little church bell. "No." Little lie. "It's just important that this all stay quite under wraps." He was playing it cool. He was bottling it up like a good little Time Lord. He'd keep it sealed up behind his smile and tapping foot because that's what needed to be done.