It is a sign that the dreamer, who will have to compromise his freedom, will experience surprise developments and his perspective will change in his emotional life, and they will have completely different criteria for spouse candidates, especially for single people.
It is a sign of getting upset and facing a desperate situation after a bad news from relatives. The black sweater is also referred to as having a broken love story, giving up on marriage at the last moment, and not having a child despite the desire to have a child.