In my current game the previous pope sired an illegitimate daughter and died shortly after. She is now listed as an antipope and has an inheritable claim on the papacy. What are my options if she makes it to adulthood (currently age zero and in court at Rome, so she may not make it...)? Will getting her to my court make her my antipope? If I marry her to someone and they have children can the anti-papacy be inherited (or only a claim on the papal territories)? Am I right in thinking that there is no possible way for me to push her claim?
Love to hear your tips for making use of the situation if she manages to come of age.

Love to hear your tips for making use of the situation if she manages to come of age.