Minor companion spoilers for Corruption of Champions ahead~
To trigger the event, you need to be possessed by Shouldra and Maddie needs to be working at the bakery.
Shouldra is that girl who appears in the ruined town near the lake. Get on her good side, make her a companion, and once she starts mentioning the bakery, that half of the conditions is complete!
Getting Maddie at the bakery means doing a quest for the minotaur in the kitchens. Once he asks for honey, find the bee girl in the forest and beat her in a fight until you get honey. Keep in mind the pure honey doesn’t count! After that, bring the honey to the baker and choose all the options that involve staying at the bakery until Maddie’s scene finishes. The other half of conditions is complete!
Finally, go to the bakery! You might need to go back and forth between Tel’Adre and the bakery until Shouldra makes her request, so just keep trying until you get it. The same goes for receiving the honey quest and turning it in, so be patient. Ask me if you have any questions!
Hope this helped~