Dreaming of incest means you have not found love or intimacy outside the immediate family thus resulting these taboo thoughts. If you don’t have any reasons why these incest dreams are recurring, you may have been a victim of the act and are too traumatized to associate what may have happened in the past to the current dreams.
Seek help if these dreams of incest continue to trouble you.
The dreamer is feeling trapped in a situation that is unacceptable. He sees her as his sister, the one who he wants to protect from all the world and from himself. She is forced to be intimate with him in fear of being rejected. Both the relationship and intimacy is unhealthy, and should be stopped immediately.