"... fear and its cousin, ..."

[Odessa Dawn]

"In response to the sense of loss there is always grief. Most of the time in addition to the grief what dominates is fear and its cousin, anger."

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More: A Response to Loss | Psychology Today

Does "cousin" in here mean comrade/counterpart? I think that with fear comes anger. Definition of the word cousin in this dictionary has nothing to do with the exact meaning of cousin in the above context.
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[Chicken Sandwich]

***** NOT A TEACHER *****

Fear and anger are related, just like cousins.

Definition of the word cousin in this dictionary has nothing to do with the exact meaning of cousin in the above context.

Words are not always used in their literal meaning.