@kattt I thought exactly the same thing.
Although her son may not have explicit memories in the future, he will definitely have implicit memories of his mum and early childhood. This is likely to still impact him (childhood trauma). What a tragic loss, with lifelong impacts for her son.
Beautiful touching raw article. Thank you for sharing.
It very much sounds like the writer made the right decision - a narcissist doesn't respect boundaries, and are highly manipulative (and lacking in empathy). Narcissists routinely view children as possessions. I hope that you are receiving professional support to make sense of the situation.