Saeril looked and listened, a sign of understanding her every word. If she wasn't too sure of her feelings, then the elder will not pry too much on her thoughts. It would be considered inappropriate, so the elder will respect Yavanna's wishes, and keep her distance away from the princess' private affairs. "I understand", she said, accepting her honest answer, like how a mother would for their child. 

"Don't worry. Your secret is safe with me", she smiled with reassurance, before giving a wink.