Most HiE's explain how you got to Equestria and your life directly after leading to the beginning of your relationship, but what happens after? After all the adventures, and the villains, and the parties, and you find yourself at the end of your life as an old man close to death, reminiscing on the friends you've lost, on the adventures you had, on the family long gone and you sit with your wife, and see fears of your final good-bye as she knows your final days are coming closer and hers won't come for thousands of years. You've had a wonderful life.