Carolyn Hax: How do you tell a tween his ‘cousin’ may be his sister?
- Posted on July 11, 2026
- By Washington Post
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- 1 min read
Carolyn Hax: How do you tell a tween his ‘cousin’ may be his sister?
Ex-husband’s shocking betrayal with an in-law was 11 years ago, but it’s news to the letter writer — and the children.
