She's trying to fill a void, Keefa. She has a hole in her heart as well.
Some people jump right into other relationships, they are called rebounds for a reason. But if she hasn't done the work on herself to fix the things that are broken, she will carry these same issues into her next R.
Some people turn to drugs and alcohol, some start working 80 work weeks, some people gamble, some people hop from one R to the next.
Focus on you. And fixing yourself so that when/if W comes back around, you are healthy and strong. If she doesn't come back around, you will be healthy enough to start with someone new.