Hi Lisachloe
Welcome to RootsChat!
I'm sure we will be able to help you with this one.
I am having a bit of difficulty understanding exactly what you are saying in your posting though.
You say that Alan Hibbert was brought up by Jack Wild and Annie Waters and that you had thought they were his own parents - presumably you mean you didn't know their names and assumed they were Mr & Mrs Hibbert? But before that you said his mother's name was Maria Hall. I'm confused.

Is it correct that Alan Hibbert's wife (your mother in law) is still alive but won't tell her son about his father's background - or am I getting mixed up again!?

Are there any other family members from that generation alive?
If Alan was only born in 1934/35 there must be lots of people who remember him.
Look forward to hearing from you - hopefully we will be able to move you on a bit when a few things are clearer.
Best wishes
Ticker