Did Sara Benamy really live in London for 4 years?

well there is a long story to this question. She met a man in Philadelphia who she then decided to mary when she was only at the young age of 15. So yes the 20 year old man dragged her to london and decided to keep her hostage in a trailer in his back yard. 4 years later a man named Austin Nelson was walking down a lonely ally way. when he heard feed me. He then took Her back to the united states acting like he was going to help her out. he invited her to his house. when she arrived he then trapped her inside. she was found years later in a river in Costa Rica