Marrying in the dark

This incident happened to a friend who had a cousin who worked in their local county town. In July 2018, her cousin suddenly committed suicide. At that time, they were her cousin's parents. In the morning, when they saw that her cousin hadn't gotten up, they went to knock on the door. However, they knocked for a long time, but there was no response in the room. The elderly couple opened the door and found that her cousin was hanging on the door handle.
But strangely enough, when my cousin died, she had a smile on her face and no signs of struggle. However, the door handle was not high and only about one meter above the ground. A normal person, even if they wanted to hang themselves on it, would not be able to do so. Moreover, the elderly couple slept next door, separated only by a wall, and during this time, they did not hear any movement.
But the weirdest thing is that my cousin had no reason to commit suicide, and there were no abnormalities in her daily life. If there is anything strange about her, it is that she has been particularly resistant to the arranged blind dates at home since she joined this company.
Additionally, during her lifetime, my cousin once said that she often dreamed of a man who said he liked her. In her dreams, even after my cousin refused, the man continued to pester her. But at that time, the elderly couple thought it was just a dream and didn't think much about it. Because the final examination result showed that they committed suicide, the elderly couple could only handle their cousin's funeral arrangements.
But strangely enough, not long after their cousin was buried, the elderly couple often dreamed of her. In their dreams, her cousin sat in a small park, crying non-stop, while a man next to her who couldn't see her appearance was pulling her. But whenever the old couple tried to stop them, they would suddenly wake up.
Because they had been repeating this dream for many days in a row, the elderly couple felt very strange. So they found a gentleman in the local area. The gentleman asked Xiang and then asked the elderly couple if there was a small park near their cousin's company. He said there was a grave behind that park. When my cousin passed by this park on her way to and from work, the owner of the grave caught her eye and thought she was very beautiful. So he pulled her down and wanted to marry her in the dark, but she still didn't want to. Currently, the man is still pestering her.
Afterwards, the old couple went to the small park and saw that there was indeed a grave behind the park. According to what was written on it, it was the grave of a young man.
As for how to handle it afterwards, she doesn't know