1. You were doing legitimate household cleaning.
You moved furniture/items to clean the floor and radiator.
2. Your mother immediately focused on a missing item.
She asks where the 30th-anniversary photo is and says you should not touch her things.
3. The item was found quickly nearby.
That supports your point that things may be moved during cleaning but are generally not lost.
4. The conflict de-escalates once she sees it.
She says it is all right after you explain.
Mad Mod Style 