I am not sure about the link between women diagnosed with personality disorders and children with autism. It sounds like a really interesting link.
Even just as a patient who sometimes needs MH services, I've met at least three adult women diagnosed with BPD who have a first-degree male relative diagnosed with autism, and at least another three women diagnosed with PD who were then assessed by NHS ASD services and diagnosed with autism.
When boys and men struggle with communication, social interaction, emotional regulation and self-injury, first thought is autism. When women and girls struggle with communication, social interaction, emotional regulation and self-injury, first thought is that they have a flawed, hysterical, character (too angry, too dramatic, too needy), or that they need a label that warns other professionals that they're "difficult", and, well, BPD/EUPD is right there. (And their social difficulties often result in others taking advantage of them, meaning many have a trauma history, which bolsters the PD hypothesis.)