Connection between your parents/spouses and mental illness?

There have been a lot of studies how people with mental illness are attracted to other who have mental illness.

I was wondering if someone whose parent is mentally ill tends to seek out partners/spouses who are mentally ill?

My mother had an undiagnosed mental illness that may have been schizophrenia and my spouse was diagnosed with bipolar disease.

I have searched and found no studies that looked at this connection, but it seems unlikely it has never been studied, so I may be doing a poor job of researching. I was wondering if anyone knows what the scientific literature says, or what your experiences are?

My brother has Asperger's Syndrome. My sister is psychotic. My dad has paranoid personality disorder, and my mom is narcissistic. I had a relationship with a guy in high school who was later diagnosed with some sort of mental illness and put in an institution. Later, I married a guy who was a narcissist. Then recently, I felt a fated attraction toward this guy at work who is a narcissist. Luckily, I can recognize the disorder now and I stayed away. I never seem to connect with people who aren't mentally ill. I don't have many friends, either. I have one good friend who isn't mentally ill herself, but just like me, everyone in her family is mentally ill.