A job lost, a diagnosis, a parent dying. Stress from outside does not stay outside — it arrives in the relationship and reorganises it, and couples who were fine at ordinary life can come apart here without either of them doing anything obviously wrong.

Guy Bodenmann's research on dyadic coping made the useful distinction: what predicts how a couple comes through is not the size of the stressor but whether they treat it as one person's problem or the couple's. Two responses look supportive and are not. Taking over completely, which quietly communicates that the other person is now incapable. And stepping back to give them space, which is often what the stressed person asked for and almost never what they meant.

The other half is rarely said out loud: the partner who is not in crisis is also having a hard time, and has nowhere to put it. Their own week has been flattened by something that is not theirs, and complaining about it seems obscene next to the actual emergency. So they say nothing, and it accumulates, and it comes out three months later as impatience that neither of them can account for. Naming this early — 'this is hard on you too and you're allowed to say so' — prevents a surprising amount of damage.

What works in the meantime is specific and small. Ask what kind of support is wanted today rather than assuming, because it changes daily and yesterday's answer expires. Take over concrete tasks rather than offering to help, since 'let me know if you need anything' puts the work of asking onto the person with the least capacity. And keep one thing that is not about the crisis, however small — a walk, a programme, anything that reminds you both there is a relationship underneath the emergency.

If one of you is in it now, ask the question directly tonight: what would actually help this week. Then ask the other one, which is how is this landing on you.

SourceBodenmann, G. (2005). Dyadic coping and its significance for marital functioning. In T. A. Revenson, K. Kayser, & G. Bodenmann (Eds.), Couples Coping with Stress. American Psychological Association.