Wife Too Nice
People can get jealous in a relationship because they feel insecure or threatened. Jealousy can be caused by feelings of inadequacy, fear of abandonment, or comparison with others. It can also be a sign of possessiveness and control.
It’s very possible that his man’s wife was pinning after her neighbor. But there are different ways to handle a situation like this. The best way to handle a jealous neighbor is to talk to them directly. Explain that you are not trying to compete with them or make them feel bad and that you just want to be friendly neighbors.