a lot of it would be open to interpretation on your end but the basics are that they would have the same father (so different last names). jane's dad became a non presence in her life by 1997, but a lot of that was due to her mom being petty about the divorce and not letting him see her, things like that. i was thinking one of the things she was petty about was that he had had a new family, so i was hoping the sis would be between 20-22. jane sort of got in contact with her father after she was 18 and things were sort of strained there but she would have wanted a relationship with her little sister in some form. we can figure out more if you're interested? like i said, i'm very open regarding most details!