Given the possible context of "Futa," which is related to Shemale or transsexual characters, combined with "sisterly duties," maybe the user is referring to a cultural or online phenomenon where such characters are depicted in familial roles. Perhaps there's a specific genre or community that uses this term. However, if "Futa Lition" is a misspelling, I need to clarify, but since I can't ask the user, I have to make educated guesses.