It was only when Sophie’s husband accused her of giving birth to another man’s baby that she went for paternity tests and discovered that her husband was right (sort of). The baby, then aged 10, wasn’t his, but she wasn’t Sophie’s either. She belonged to another set of parents, who had been raising Sophie’s biological daughter in a town several miles away.

Also, it’s important to know who you’re writing your life story for. Writing for your family and friends is great! But it requires a different perspective than writing for publication. If you’re interested in getting your life story published by a traditional publishing house, then you’ll need a whole different perspective than if you’re self-publishing your memoirs. 
Why it helps: There’s no need to do the actual examination and investigation now. Instead, just focus on identifying what it is you might delve into someday—in a memoir or in the pages of a journal or just in your mind. What truth is important for you to get at? You have a structure (your three sentences), you have a crucial event (that may have caused or contributed to that life story) and now you have a purpose—a reason for writing that will let you learn, enjoy and even be surprised by the story you’ve been waiting to tell yourself and—maybe, just maybe, the world, as well.
Yes, you have to be precisely honest and quite revealing and candid to write a successful autobiography. And obviously, you need to describe some hardships of your life to show how you coped with that or how it influenced you. However, we strongly advise you to describe the thing that you feel rather calm about when writing. For example, you are writing about other students picking and making fun of you at high school. If you still feel like wanting to kill them all, it would be better to avoid this topic or mention it slightly. Why so? Because your feelings will leak into the writing and make your reader feel subconsciously uncomfortable.
These two sets illustrate how you should show the entire action and then show the entire reaction. Don't mix the two together in one paragraph. Write your entire book in this way — action and reaction, one complete set after another. If one part of the set is missing, readers will sense an awkwardness. If you're writing an autobiography, or anything else, action/reaction sequences will make your writing lively and natural. As you expand your ideas, write in action/reaction pairs.
Develop a central theme, main idea or thesis that clearly explains the purpose behind your autobiography. For example, your theme might be about how you overcame obstacles to become a stronger person, or it might explain why a particular passion -- such as mountain climbing or rescuing animals -- is so important to you. Back your theme with details and background information about your life experiences. For example, you might explain that your dad is in the military, so you've had to learn how to adapt quickly to new schools and unfamiliar environments. Or, you might discuss what it was like growing up in a poor, single-parent home, but how your family was always willing to take in injured or stray pets.