Felicia del Pino has delusions and it is likely that she suffers from some mental disorder, perhaps schizophrenia.
Every idea seems to her connected to thousands of others by a tangle of pulsing nerves. She jumps from one to another like a nervous circus horse. It is worse when she closes her eyes.
On top of this, Felicia suffered more than her share of tragedy. She met Hugo Villaverde, they made love, and she became pregnant. Felicia's father did not approve. When Hugo returned months later, he married her but revealed himself to be an abusive and neglectful husband and father. Hugo had contracted syphilis from sleeping with other women and had given it to Felicia when he returned. One day, after she'd had enough abuse, Felicia tried to burn her husband alive. Felicia's daughters take their father's (Hugo's) side further alienating Felicia. Felicia does feel connected to Ivanito, but her delusions continue and this leads to her losing him as well.
Her second marriage ends when Ernesto dies in a hotel fire. And her third husband, Otto, also dies; it is debatable if she kills him or if he dies accidentally. Felicia seeks solace in religious paraphernalia and the practices of Santeria, but nothing can overcome her delusional state of mind and troubled past.
Had she gotten better medical help for her mental condition, her life might have been more pleasant. As she grows older, her behavior becomes more despondent and erratic. This can be attributed to the combination of her mental state and the tragedies from her life that continue to haunt her.