Welcome Fear and Shamed
Nobody visits our house because my wife makes them feel like trash.
I wonder how common these empty homes are. I have a similar problem as my wife feels our home is substandard and ashamed of it. In reality it is nice and sparkling clean and only her insecurities are speaking. Still I have not tackled inviting people over yet. But your problem seems to be a lot worse - demeaning behavior towards guests .
Whenever she gets a particular tone in her voice I feel dread falling like a heavy sludge imprisoning me in my own home.
Can you find a place close by where you can flee to when it is getting too oppressive? I found a nice coffee shop where I fled to when things were bad.
My dog immediately hides under the table and begins shaking.
Imho. the emotional intelligence of animals should not be underestimated. Would you be able to take the dog for a walk if it is not feeling well? May do the dog owner some good as well.
I have been tortuously trained through her endless abusive ranting sessions never to disagree with anything she says.
Again taking a walk could be helpful. It is not that you can't stand her but the dog is not feeling well... .
I am scared that she might discover that I am again reaching out.
You have a right and frankly the need for human connection and support. You are doing this for your and her sake. Your current situation sounds horrible and you sound like you are breaking down sooner or later . Be careful but please give your needs some priority. Over the years it can wear us down and then things can turn really crazy. Often members arriving at the board are somewhat depressed . Consider also getting professional mental health support - possibly you are suffering from stress at work or make up another story.

and hang in there. Sharing is a first step to make small but powerful changes,
a0