It is not apparent that one scorpion means more. There can be only scorpions at your home, but scorpions generally love to be a group and feed on different kinds of insects if they like the taste.
People are usually afraid of just one scorpion because they think it can bite or cause pain. Just imagine if there’s more than one scorpion, it can make people feel like jibbies.
But it would help if you started to look carefully through the narrow spaces like your stinky wet shoes or any moist areas. You need to keep the rooms clean and keep on checking.