Absolutely not. If the will was not changed then you are entitled to the money, irrespective of the relationship changing. The only exception to this is if you were married and then divorced in which case you would not be entitled to anything, or if the deceased married after he wrote the 2004 will.
If you are asking "am I definitely entitled to the money?" then the answer is yes. As regards XXXXX XXXXX it all depends how awkward the executor becomes. It may be that a firm is prepared to take on your case on a no win no fee basis. Without knowing the full reasons for the executors delay it is difficult to say with certainty that everything will be straightforward, but I would much rather be in your position than the executors.
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