What a fabulous take on the prompt, and such an in-depth character study of Petunia, totally standing every thing we thought we knew about her on its head. The story was beautifully written as well, carefully crafted and the pacing was excellent. I''m pretty sure I know who wrote this one (someone was very excited to get this story I think and that someone is a Petunia lover....) and you did not disappoint!
I really loved your Harry and your Severus as well. Both were so thoughtfully drawn.