There should not be any such inappropriate stories involving Disney princesses. Disney princesses are characters mainly targeted at children and family audiences, representing positive values like kindness, courage and love. Any form of sexual content associated with them is completely against the essence of these characters.
Disney sex comics are an illegal and immoral form of content. Disney is all about providing entertainment suitable for all ages, and such comics go against everything Disney stands for. They should be avoided and reported if encountered.
One idea could be a story where Cinderella and Belle become friends and exchange their experiences of dealing with difficult situations. Cinderella could share her story of escaping from her stepmother's tyranny, and Belle could talk about how she coped with the Beast at first.
Some Disney - themed forums might also have links or discussions about Disney princess x Disney princess fanfic. For example, Disney fansites where people gather to talk about all things Disney. Sometimes, members will share their own fanfic creations or recommend ones they've read.
Definitely not. Archie Comics operates independently of Disney. They have their own fan base and publishing history that has nothing to do with Disney's franchises and properties.