I know this might sound funny, but Mary is pretending to be a witness! I met her at a Kingdom Hall.
Then why does nobody else know about this?
If Mary is still alive and 2 millenia old then how is it that no great grandparents, then grand parents, then parents, and now children ever stopped and wondered why this super-dubette looks the same now as she did 80-100 years ago?
Honestly, you scare me. People who imagine such elaborate delusions need help. I'm not saying this to shame you. It's like any other disease that requires medical professionals to treat. You should get yourself help before you or innocent people get hurt.