That is so interesting, thank you.
My DB hasn't spoken to me in 30 years! We were best friends, shared a friendship group etc. - until he met his wife.(Sil).
She has a very unconventional family (her DM is the long term mistress of her DF, a married man with children (maybe, there is no clarity about whether this man is her real dad either). None of us are supposed to know any of this.
Sil was all about her family, DB was soaked up by them. Slowly she cut him off from his friends and family. He didn't need them, he had hers.
With our family she was antagonistic and precious. Her way or nothing. Her family came first.
Until more recently, where she has fallen out with her family too.
She was competitive (especially with me). He says ‘I got it all’ from our parents. Many, many examples of where this isn't true but I get that that’s how he feels, and the reality isn't so important.
I'm university educated, professional career. Him, not so. He hates that.
My DM prefers him, panders to him and says my DF definitely got what he wanted when my DB arrived (I was first born).
Over the years, DB has changed from a funny, light-hearted, caring young man, to an absolute, bitter misery. He looks so sad. No friends, no hobbies. Distant with our parents.
At my DF’s funeral he showed how much he hates me (to the point where he can't even look at me across a table) and was obnoxiously rude with other family members.
She was much more welcoming and chatty!