My H said the same thing to me. However, the first time, we kissed and hugged, I knew he was full of sh!t. I didn't sleep with him and when I left a few days later he slept with OW for the first time. Hindsight is 20/20. Don't worry, it will be there when it needs to be.
Everything happens for a reason, maybe Dad needs to find that it isn't better out there, he needs to realize how good he had it here. Maybe he will find God and that is the most important thing when he finds Him he will know he is supposed to come home.
