In episode 4143, Ana has come to Bichlheim to visit her mother Nicole. She doesn't have a very close relationship with her, so she's afraid to tell her that she spent the money for her studies on her horse instead.
In episode 4138, Katja Neubach (played by Isabell Stern) came to the "Fürstenhof" to recover from her divorce. Charlotte's cousin has always remained in loose contact with Werner, even after the separation.