Ask about Balgruuf's strange children

Walkthrough
While at The Bannered Mare, if the Dragonborn asks Hulda if there are any rumours, she can intimate that there is something strange going on with the Jarl's children. This can only happen after the quest Dragon Rising has been completed.

Ask about Balgruuf's strange children
The Dragonborn can then go to Dragonsreach and ask Jarl Balgruuf the Greater any assistance is required regarding his children.

This leads to the quest The Whispering Door.

Frage nach Balgruufs seltsamen Kindern