Meesei did not exactly distrust Anders and his entourage. At least, they had done nothing to make themselves seem suspicious, but as they were walking into an exceptionally large clan of lycans, she could not be too careful. Clavicus was an underhanded and crafty Daedra, so it would not be impossible for him to plant informants within the clan if he managed to learn of its location.  Overall, Meesei was very aware of the actions of those around her. At least with Jerrick's inner circle, she could likely assume that they had been with him for quite a while, though she would need to ask in order to confirm.

"It was not Hircine who told us to come here, actually." Meesei began. "We have been working against Vile for some time. Most recently, Hircine directed us to a cult of Molag Bal, a Daedra that is neutral toward both Vile, and our lord. We gained a sort of alliance with the cult, and through them, learned that Vile's followers tried to do the same. Through them, we learned that Vile's followers likely intended to come here, to make your clan a target. Our purpose here is both to warn you, and to aid you against their efforts. Now, what is it that Hircine told you?" Meesei's tone was polite and friendly, and as long as Jerrick was just as civil and cooperative, it would remain that way. Jerrick was the Alpha of his clan, and Meesei had no intention of taking that from him, but if he or anyone else in his clan started to defy her, she would have to show that she had the authority.