Hi there, happy to hear that you're enjoying the game! The ending that I think you're getting (the first one in the extras menu?) is the ending that you get when you act too suspiciously. You can avoid it by revealing more information about yourself when given the option to, and refraining from asking too many questions early on. Try not to contradict yourself as well -- for example, if you said you had a brother before, don't mention a sister later on, etc.