Unmarried father of three, househusband, booted Washington

[Cangarton]

My friend and his girlfriend have been together for twenty years, except for 2 one year periods when they were split up. They have three children together, plus she has a 2 1/2 year old from the last time they split. He has mostly worked in the home, taking care of the household and the children. She works outside of the home, and generally pays the family expenses. Whenever she gets angry, which happens more and more frequently, she takes his phone and car keys and kicks him out. Her step-father recently bought a home for her, and he has paid a lot of their expenses over the years.
My question, after this twenty year relationship, is she right in assuming everything is hers, and nothing is his? Is he entitled to half of wealth they accumulated? Including the new house? Palimony payments? What should he do to assert his rights? He thanks you.

[cbg]

The state of Washington does not recognize common law marriage.

[Cangarton]

I am aware that Wa doesn't recognize common-law marriage, but what about palimony?

[cbg]

Without any kind of written agreement entitling him to anything, he's got about as much chance of receiving palimony as he does of winning the lottery and being hit by lightning on the same day. Even in CA, where the term originated, most palimony claims fail.