Gordon was practically climbing the walls and she honestly didn't know what to do. She was friends with all the Tracys and she agreed John was most certainly not himself, but she didn't think his recent show of out of character-ness was quite as bad as Gordon seemed to think. Then again, as he rather rudely pointed out, she didn't know him as well as he did, and it was, as far as it went, true. She didn't, but frankly John was always a little odd. The man was faceted and could easily change on you with no visible indication.
In the end, Gordon had stormed off and she had sought out Parker; the man was as good at reading people as John, and his insight was much-needed right then. He was in the kitchen with Mrs. Tracy, the two of them quietly talking. She felt rather rude interrupting, but if she didn't the two would talk all day and she really needed to work this out—the more she mulled it over in her mind, the more she found herself leaning towards Gordon's fears.
Quietly clearing her throat and muddling through the required small talk, she fielded her information and pitched her question: was Gordon right about John?
Mrs. Tracy confirmed that John was being strange, stranger than normal, certainty, but she wouldn't have said he was acting in a way that would warrant a response such as that. The boy was apparently tired, they all were. This incident had thrown the boys off; using Gordon's own behaviour as an example, this near paranoia wasn't exactly standard. Parker, on the other hand, took the more cautious route, not wanting to offend the matriarch, but pointed out that as a rule going Master Gordon was a good read of characters and situations. If he said there was a reason to keep an eye on the normally space-bound man, perhaps there were grounds to.