A friend of mine stumbled on a true-to-life bridge daughter. Recall the premise of my novel:

Hanna is a “bridge daughter,” born pregnant with her parents’ child. In a few months she will give birth and die, leaving her parents with their true daughter.

Compare it to this Redditor’s story (from /r/raisedbynarcissists):

The summer before I turned 16 my parents went to a fertility clinic in the city to see about having another kid. My mom had been sterilized after my sister was born because of complications during lil sis’ birth that made it obvious that trying for another kid wouldn’t be healthy. 10 years later, all of my mother’s kids are grown into at least preteens and she was without a baby.

…

Then [my parents] asked me, their 15 year old daughter, if I would allow 3 of my parent’s fertilized eggs to be planted in me when I turned 18. They wanted me to carry potentially 3 of my own siblings to term and give birth to them. Mom would take the next batch of 3, and the last egg would go to me.

The whole crazy story is here. Download a sample of a far saner version of this story at Amazon.