SHOULD I FEEL BAD?

I think I'm playing games with my husband. We've been seperated 17 months now and I have received a total of $500 from him during this time. Well, he made me a little upset so I called his credit union and asked them to send me a check for $600, which left him $175. My name was still on the account, and they gladly sent me a check which was cashed on Monday. During the past 17 months I have been calling monthly for balances, receiving statements, and they sent me a new card with my account number on it. I get a call yesterday from the Postal Credit Union saying my name had been taken off the account over 18 months ago, and they placed a stop payment on the check. They could not tell me the date of which I was removed from this account!! Now the CU wants their $600 back. My husband in the mean time is wining and dinning his two bar-flies, while my kids are suffering. There has been no paperwork filed. It will