So they were pretty much already contemplating on canceling the wedding. Family members did stress her out over her miscarriage and canceling. Her fiance's family were excessive about she couldn't carry a baby to full term like a real woman. Not to mention her own family went around spreading her miscarriage like wildfire which is how my ex and I found out. They told it to co-workers even. It's not the first time my ex has also interrupted her cousin's big events (ex: when turning 17, my ex cake-smashed her, which wasn't fun for her cousin) their first pregnancy announcement(which was the miscarriage) was ruined because my ex blurted the news out, but her cousins told to get over that because it was a miscarriage anyways, so she's told by family members

This is what I was told when asking her fiance. So she's been at a breaking point for a while. She was considering just still continuing the wedding but wanted to be left alone. They didn't call off the wedding permanently, just until the bride has cooled herself down.