They leave and Satan wins.
Satan only wins if a person lets him win, or throws the game to him. This couple openly rebelled and made their position clear, the church made its position clear. If they really wanted to stick around, they could have gone the way recommended them by the church. Not easy, but if one hears what Christ said about what each and every one of us would ultimately have to decode, wd all have our own challebges, and all have our own baggage which we have to make the choice between jettisoning it or letting it weigh us down, just below what we could achieve.