Simpson, married to his childhood sweetheart for almost 19 years, had walked out on his wife and kids and into the arms of a younger woman. The breakup surprised his wife, his friends and even Simpson himself. Looking back, he says, it was a classic midlife crisis.
In that we have already provided the definitive answer to this question elsewhere (relying on rum extract), we assume your follow-up is seeking a non-alcoholic substitute for rum (as extracts can be as alcoholic as or more alcoholic than the spirits they replace).
Sherry or Bourbon-Orange or pineapple juices, peach syrup, or non-alcoholic vanilla extract. Substitute equal amount of liquid 1 to 2 teaspoons vanilla extract. Southern Comfort-Peach flavored nectar combined with a small amount of cider vinegar.