What does it mean if you’re in an interracial relationship and your partner doesn’t defend you if someone makes a racial slur?

So it happened twice and I was extremely upset but she never said anything to them. I’m mixed and she was white

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So it started to reveal a darker underbelly most of her family don’t like black people
What does it mean if you’re in an interracial relationship and your partner doesn’t defend you if someone makes a racial slur?
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