Find the Boy's Mother Inside the Circus Tent is a side quest which is related to the subquest Investigate the Circus Tent.
Giran, a boy outside the circus tent in Waukeen's Promenade, will tell Gorion's Ward and their party that his mother entered the tent, but she has not returned. The boy will ask you to search for his mother. Enter the circus tent and you will find out that his mother, Hannah looks like a spider, due to Kalah's illusions. She can be found in the same area as Aerie. Complete the subquest Investigate the Circus Tent and speak to Giran's mother after the illusions are gone. After that, talk to Giran again outside the tent to complete the quest.