It could be that, while she was feeling emotional for Kinsey, she was trying her best to keep her powers from activating. Katie realized she didn't want Kinsey to be hurt or affected by her curse.
When she saw Walther attack Kinsey the first time they arrived that day, Katie was terrified. She was afraid that Kinsey would be hurt because she knew what kind of ability Walther was in combat.
She even worried about the man if her people would lock him up and torture him.
She remembered feeling overwhelmed with relief to realize that it had not happened. Katie was relieved that Kinsey was already part of this tribe.
Since then, she has realized something. No matter how broken her heart would have been six years ago, Katie couldn't help but admit... that man had completely taken control of her heart and mind.
