I'd never really connected the narc parent leading to narc partner but that happened with me.
I left home as soon as I was able, to the point I slept rough at 16 just after putting the last fullstop on my GCSE exams. I met a guy who started out lovely and over time just treated me like shit. I was fat, I was lazy, I wasn't pretty like his last girlfriend. He was bloody violent as well.
Another thing I recall from my mum though, I would get invited to birthday parties when I was at primary. She would build me up for ages between getting the invite and the day of the party.
I would be told I had to behave enough to go as it meant her buying a gift out of her house keeping.
Every sodding time she would wait until the day of the party to do what she termed a "behaviour discussion" then she would go through what minor incident meant I couldn't go. And I'm not talking being bad, I'm talking stupid stuff like my shoes were not placed next to each other in a row. I didn't bring her cup out to the kitchen (I wouldn't even be aware she was finished with it).
The worst one was when we had been to the dentist and he said to both me and my sister about how important it was to brush our teeth. She decided that I had "embarrassed her" and was "dirty". He literally just said what all dentists say to everyone!
Even as I got older, my best friend, who is still my mate now and her mum regards me as a daughter we are that close, got us tickets to go and see a band when we were 14, with adult supervision. They were paying for it all, she literally had to do nothing at all.
She waited until the evening before and said because I got 49 out of 50 on a test, I couldn't go as I needed to study harder. So even though I got an A, and my teacher was pleased with me. Even though she rang them up and she said I got the highest mark and it was a great mark. That 1 point off made no difference. That was the behaviour discussion black mark and meant not only could I not go, but my mate and her mum lost money for the ticket, the train ticket she bought and my mate went with just her mum rather than with me.
Even though she did it every time I still used to believe that this time I would be OK to go. My dad was too scared of her to intervene.
In fact the only time I went to a party was when I was 12. She was unwell at the time, she used to suffer with sinus issues that left her in bed for a week. So my dad said of course I could go. He even bought me an outfit to wear and I was so happy I hoped she stayed in bed permanently. Of course when she found out she went crackers at us both.
The gig one though was the moment I knew that I literally had no chance with her, that she would just wait for any excuse to be vile. Even though during primary it meant that I became the weird kid who couldn't go to parties or to people's homes for tea or have people to mine, she didn't care.
My sister meanwhile went to everything, she had parties and sleep overs. At 14 she went to London with 3 friends to a gig on the train! Apparently this was put down to her being more "streetwise and smart" than me.