Partner tells their parents everything? When it matters

You mentioned money worries once, in bed, late at night. Two weeks later their mother asks how the budget is going. It wasn’t a secret exactly, but you didn’t expect it to travel.

A lot of people in their 30s run into this once they move in together or start talking about the future. On October 25, 2026, Carolyn Hax took a letter from a man whose girlfriend’s parents knew all their business now that the couple was living together. He wanted to ask her for something “more typical.”1 The question isn’t strange. But “typical” is harder to pin down than it sounds.

Every family has its own privacy rules

Communication researchers describe families as having privacy rules: shared expectations about what stays inside and who gets told what. A 2011 study by Sylvia Mikucki-Enyart applied that idea to in-laws and found that more uncertainty in the relationship went with feeling less like part of the family and less satisfied with it.4 In some families, telling your parents about a fight is normal and even caring. In others, it would be a betrayal. Neither is wrong. The trouble starts when two people with different rules share one relationship.

A 2008 study by Mary Claire Morr Serewicz and Daniel Canary looked at it from the other side, at what newlyweds heard from their in-laws. When the disclosures signaled acceptance, relationships went better. When they were gossip or criticism about family members, relationships went worse, and how much it mattered depended partly on the person’s own family’s privacy style.2

The mismatch is the part to watch

The strongest finding here isn’t about oversharing at all. In a study that followed 355 married couples for 16 years, Katherine Fiori and colleagues found that spouses often disagreed early on about how close they were to each other’s families. Disagreement about closeness to the wife’s family predicted divorce, even after accounting for how close each spouse actually was.3

That study shows a link, not a cause, and it followed married couples who started in the 1980s. Still, the takeaway fits: what hurts may be less the family’s role than not agreeing on it.

How to talk about it

Start with one example, not a verdict. “I was surprised your mom knew about the money thing” goes over better than “you tell your parents everything.”

Ask about their family’s rules. Maybe in their house, nothing was off-limits and that felt like love. Knowing that changes the conversation.

Agree on a short list. Most couples don’t need a total ban. They need a few topics, like fights, money and sex, that stay between the two of them.

Watch what happens next. A partner who hears you and adjusts is showing you something good. One who keeps reporting back after you’ve asked is a different conversation, closer to whether the relationship is one-sided.

If you’re unsure whether you’re asking for too much, settling or healthy is a useful check on what you’re willing to accept.