So much for mom saying it was her husband who was enabling Jeff. It seems everyone is enabling Jeff...

You didn't want the cabin in the first place and you *know* how things will go down if Jeff is involved. It is the same pattern, as you came to realise after mom did a turnabout. Nothing will change if the same players keep engaging in the same moves. THEY won't change (mom, Jeff) so this means YOU will have to do something different.

The best (not saying it is necessarily easy) move would be to walk away.