This was the answer for which Meesei had been searching. This was what tied together the evidence. With Galsek's confession, Meesei expected  it to be much easier to get information from Harriet, not to mention what Galsek himself might provide. Once his secret was revealed, he of course started to taunt the others. Meesei largely ignored it, but a few of the others, namely Fendros and Ahnasha, did not. Ahnasha bared her teeth at the Argonian, joining in Fendros' anger. 

Meesei looked at the pair calmly. "Vile's servants are manipulators, but his words carry only the power you give them." She commented before looking back down to Galsek. She stopped charging her restoration magic through his skull, then dragged her claws across the side of his face not hard enough to break his scales, but enough that he could feel it. "My words, on the other hand, bear considerably more weight. You are going to tell me everything you know, about your mission here, about Harriet and the deal you struck. I want all of the physical evidence you have, then...you may go. You serve my enemy, but I gave my word, and I shall not break it. Of course, we both know what it going to happen when you return to Vile a failure. He is a fickle master even to his successful followers. Do you expect me to believe he will spare a worm like you? In all likelihood, he will kill you and take your powerful lycan soul...or perhaps not. Perhaps his servants will just kill you as an example and allow your soul to go to its intended destination. Have you ever thought about what that would be like? To have your soul bound for eternity to the Hunting Grounds of the Daedra against which you have waged war? I assure you, your beast spirit is not going to be so easily separated from you. Some lycans have spent their entire lives searching for a cure, fruitlessly. Even if Vile does not kill you, or if you just avoid his followers for the rest of your life, your soul will find its way back to Hircine eventually. So, you can leave here with some supplies after I have what I need, or you can accept an alternative. Serve me. Use the knowledge you have of Vile and his followers  in the service of Hircine, and you will find yourself protected by us, instead of hunted by us."