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Savage Love

When I was 14, my parents informed me that I had a half brother

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When I was 14, my parents informed me that I had a half brother. He was my father’s son by another woman. My parents were already married when my brother was born, but I hadn’t come along yet. It was a huge scandal when it happened. My half brother came to live with us after his mother died. He was 16. He got me pregnant. He didn’t rape me; I wanted to have sex with him. Everyone in the family found out, and it took me years to get over it and stop blaming myself.

Now I’m 26 and engaged. What do I tell my fiance? My parents wound up divorcing – my mother called the police on my half brother and tried to physically prevent me from getting an abortion – and I don’t speak to her anymore. But my father and brother are still in my life.

I get panic attacks when I think about having to tell my fiance about any of this. I don’t want him to see me as sick, but if I don’t tell him, he’ll hear about it from someone else. What do I do?

The Sister Act

“This could happen to anyone,” says Debra Lieberman, assistant professor of psychology at the University of Miami.

A quick clarification: Lieberman means this could happen to anyone who meets a sibling under similar circumstances.

Co-residence throughout childhood – particularly early childhood – creates sexual aversion in adulthood, Lieberman explains, who has studied “sibling incest avoidance” extensively. It’s a phenomenon called the “Westermarck Effect,” and it doesn’t just affect biological siblings; adults who grew up in the same home experience the same feelings of sexual revulsion.

“TSA and her half brother were not raised throughout childhood together and neither observed his or her mother caring for the other as an infant,” explains Lieberman. “These are the two cues that have been shown to lead to the categorization of another as a sibling. When these cues are present, strong sexual aversions tend to develop. Without these cues, no natural sexual aversion will develop.”

(What this means, of course, is that everybody who read TSA’s letter and thought, “What a sicko! I would never fuck any of my siblings!” needs to back the fuck off. If your parents had surprised you with a long-lost sibling when you were 14, dear readers, you, too, could be facing an extremely awkward conversation with your fiance.)

So what, if anything, should you tell the man you’re about to marry, TSA?

“If it were me,” Lieberman says, “I would probably say something. I would explain the situation and the science. Unfortunately, this might gross out her fiance, especially if he has sisters. But living with this stress does not seem like a happy life.”

I agree with Lieberman: Tell your fiance what happened. Emphasize that you were young, confused and Westermarck-Effect-deprived. You can also refer him to Lieberman’s website – debralieberman.com – where he can peruse the research.

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