I'm not sure specifically about 'bondage skyrim lesbian fanfic'. Fanfics are often created by individual fans and can vary greatly in availability. You might try searching on some fan - made story websites or relevant fan communities, but keep in mind that some content might not be in line with the terms of use of certain platforms.
Batgirl's sexual orientation can vary depending on the comic. In certain runs, she is indeed portrayed as lesbian, but this isn't consistent throughout all of her comic appearances.