The ex factor

His ex-wife, her ex-husband, co-parenting calls and old loyalties: what former partners bring into a second marriage, and the boundaries couples set together.

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A second marriage usually has more people in it than two. An ex who co-parents is in your calendar; an ex who never quite left is in your evenings. What you feel about that is allowed to be complicated.

These pages describe the patterns — the jealousy, the comparison, the calls that land at dinner — and the boundaries couples build as agreements between the two of them. What you will not find here: scripts for managing an ex, tactics, or a case for treating a former partner as a villain. Exes are people, mostly outside our knowledge and entirely outside your control.