“Question is: I'm I right in saying that no divorce procedure would be needed if no documents or registration was ever done. Just a straight forward prove that you love me or I just walk away is needed”.
Why are you even bothering with this women? She in my opinion couldn’t care less about you. You are her ATM, a money source nothing more, that’s one damned expensive handjob. If the above statement you made is true then I don’t think you are even married, no documents, nothing signed, marriage not officially registered?You are in your 50’s get yourself out of this situation (dump her at probably zero expense to yourself) and move on. Guess what Thailand is full of beautiful Thai ladies, come over here and play the field do not get emotionally wrapped up with one woman. Take your time don’t be so naive they are masters of sucking you in(wrong choice of words) and playing the long game.