The threat of Sara's mother wasn't limited only to William and his masters. On top of that, he didn't want to take lots of masters from the guild, to not risk a bloody retaliation from Sara's mother after this attack.
There were many things he needed to take care of, including informing Jenny about the time zone of the attack and other details. Moore was more excited to do this task, which made William sigh inwardly.
He could tell Moore grew attached to Jenny. William didn't have an opinion about that, except for Jenny to be a master from the higher world, not from this one.
"I hope you aren't overstepping here," William muttered to himself after meeting with Moore for the third time. The latter said he visited Jenny again in her dreams, a third visit that William didn't ask him to do.
"She seems to get wind of what we are trying to do," Moore warned William and delivered the message Jenny relayed.