What has changed the friendship of Catherine and Aelis?

The friendship between Catherine and Aelis has been strained due to misunderstandings and differing priorities. Aelis feels neglected as Catherine becomes more absorbed in her personal ambitions, while Catherine perceives Aelis as overly critical and unsupportive. This disconnect has led to a lack of communication, causing both to question the strength and foundation of their bond. As a result, their once-close relationship is now fraught with tension and uncertainty.