Regardless of what the bible or jws say, people are animals that are cognizant of time. We are looking to secure resources for our future. Mentally in jws accomplish this by their paradise teaching.
When a jw woman wakes up she may realize that the jw man she is with can’t provide her with resources in her old age. She decides to move on.
This happens in the “world” a lot with women between the age of 35 to 45 if they realize they’re with a loser man. They’re still young enough to attract a new mate so they move on.
When your woman starts going to the gym, dressing better, getting a new hairstyle and makeup it might not be for you.