It’s interesting because this also happens in other languages. In Dutch we only use couple (koppel) for people in a relationship.
If you are talking about other things we use “pair” if you have two. But over time people also started using pair wrong, so someone saying “ik heb een paar knikkers” I have a pair of marbles, can still mean he has 5 marbles.
In practice people usually just say I have two marbles when they mean exactly 2.
Yeah I was thinking those Waltons have more money together then even Musk.