When Brina learned about the descendant who was leading a group of rogue descendants, she was already in doubt about it. So she theorized that he was not really a descendant of Evanora but someone powerful enough to lead a group of powerful descendants enough to create havoc in humanity.
But when Freya, Aidah, and Peitho said that there is another witch, and a true witch at that who put a spell on Evanora, everything started to make sense.
"Tomas is here?" There was a surprised look on Aidah's face.
"That fucker!" Peitho hissed at the mention of the man who fooled her and stole her stone. When Peitho realized that her stone was stolen, it was Tomas who pointed his finger in Evanora's direction which caused a rift in the relationship between Peitho and Evanora.
