For older kids I think it is clearer how they feel. My brother was I think 20 when my mom left. Over 20 years have gone by and he has spoken with my mom once (at her mother's funeral). Any cards she send, he returns, any call he ignores. She tried to say hi and ask how he was doing at my undergrad graduation, as she was in midsentence he turned around and walked away from her.
It took my mother years to come out of her fog. I can say she deeply regrets it. However, she has not owned it. She always has an excuse for it, right now it was that she was anemic and must have been suffering some side effects.
I hope for all our sakes it doesn't take as long for our WWs to come out of their fog as is did my mom. However, I would also think it certainly could happen.
Me 41 W 33 M 2013 Suspect A 11/15 Confirm A 1/16 She moved out 2/14/16 Stepson 13 Stepson 16