It's not clear if Katharine Hepburn's Circus Story is entirely true. It could be a mix of fact and fiction, and more research might be needed to get a definitive answer.
No, bondage fanfic is generally not appropriate as it often involves themes that are not suitable for public consumption and can be considered a form of non - consensual or extreme behavior in a fictional context.
You can try searching on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions across various fandoms, so there's a good chance you'll find some great Ashe Basch fanfiction there.
There could be a lot of potential circus - themed stories related to Katharine Hepburn. It could be that she was part of a movie script that had a circus backdrop. In such a story, she might have had to interact with circus animals, acrobats, and clowns. Her character could have been a visitor to the circus who gets involved in some sort of mystery or adventure within the circus grounds. Without further details, it's difficult to be more precise.
Katharine Hepburn's life was a combination of professional achievements and personal challenges. Her acting talent made her a legend, but she also faced ups and downs in her personal life.
A fanfiction could focus on a power struggle between Ashe and Basch. Maybe there's a powerful artifact that grants great power, and both have different ideas on how it should be used. This could lead to an interesting conflict and character development as they each try to persuade the other to their side.