Mrs. A. it is so good to hear from you. I have been wondering how you are! I get exactly what you are saying - it is much easier to let them back in - but what you have to take a hard look at is if it's healthier to do that based on conditions and circumstances surrounding it. No one can truly answer that but you because you are the one who has all of the information. From an outsider's view though, it troubles me that Mr. A attempts to pry back into your life when things aren't going well for him, i.e. job loss. It would be much more encouraging if he was making these attempts when he had all of his ducks in a row and wasn't currently in crisis mode. It worries me that he is using you to while he gets back on his feet and that as soon as he does he's off on his next conquest.
