Based on the terms of the will, based on molly's estate, Owen is entitled to no part of her estate because the estate was already willed to her sister Nina.
According to the given question, we can see that Molly who was unmarried at the time of making her will, willed her estate to her sister and later got married to Owen and she died without making changes to her will.
The outcome is very clear as Owen is not entitled to anything, unless he is given by Nina, although he can contest the will in court, but Nina has the upper hand because legally she has the estate.
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