Do not confuse a friendly gesture with real reconciliation

After a severe argument someone suddenly becomes particularly friendly and says everything will be different. That can be a genuine first step. The question is whether weeks and months later there is also something changed in how people interact.

What gives you more certainty: one friendly moment, or behaviour that really stays different over a longer period?

A good conversation can start repair. Repair becomes credible when new behaviour endures after the emotions of that moment have passed.

Give genuine repair a chance. Testing sustainability is different from distrusting someone in advance.