Well get a grip buddy. I don't know that they lied to you. They simply told you you're not welcome anymore. Evidently you don't pay any dues or fees and were a guest. It seems the only reason you were there was because you were the son-in-law. Now you're not. They value your X-father-in-law enough not to make him uncomfortable. You may have been pals or friends with him..... but when the deal with his little girl went south so did all priviledges and bonds. Don't call them a liar. They told you how it is.... they don't want you there anymore. If the new boy friend fills you spot... so be it. Get on with life. You can't hang onto the father-in-law.