Why the change? People grow up - some folks are fine fukking new partners until one day they actually think about the risks, not the labels. Some people break up with an s/o and don't want to be tied down again, they enjoy the freedoms of being single, until they don't want to be. Being Betty Crocker doesn't mean she ain't still a freak, she just decided to be a freak for hubby.
And women with high body counts get wifed daily without having to front, not sure where the idea that it only works out if they emulate a good girl comes from. These IG hoes, strippers, and known thots are prime examples.