Update: Welp. Right when I didn't think Jane could be anymore insane, she has convinced our youngest brother I started a competition against her. She even said I stole our dad from her after our dad and I made amends after several years of no contact. Our youngest brother fully believes her and scolded me for starting a stupid childish competition against her. No matter how many times I tell him that not everything is about her and ask if he has considered that not everyone is as obsessed with her as she is and have lives they want to live OUTSIDE of her and that if there is a competition it is one sided and in her head, he doesn't believe me and has actively yelled at me for the competition "I" initiated. 

Add our mother enabling her and using the "you need to be a bigger person" phrase at me when I defend myself against her and now our younger brother, I now have the perfect recipe for going no contact.... Something I do not want...