What disturbing thing happened between Mr and Mrs Brawling that likely led to their marriage?

Mr. and Mrs. Brawling experienced a traumatic event that brought them closer together, such as a shared loss or a life-altering crisis. This intense experience likely forged a bond between them, leading to a sense of reliance on one another. However, the emotional scars from this event may have also contributed to a tumultuous relationship dynamic, hinting at underlying issues that could affect their marriage in the long run.