My husband is 20 years old. It is our second marriage.. My first husband died in road accident after 3years and 3 months of my marriage and than my son was 2 years and 3 months old. I remarried with my husband after 7years of my first marriage and my husband married to me after 2years of his divorce. I was worry like you about age difference but my husband said it will be no problem because you are marry to me after a long time after my first marriage. I was ready with all proves when I went for my interview but they just ask me a very simple question about my husband and they do not ask me show Amy thing. But they enquired for me from my 4 and 5 neighbors of my village by calling them about my first husband, if my marriage is real, if they know about my marriage. My villagers said yes it is a real marriage. In my marriage, there are only few people as it was our second marriage. Only my mother, brothers,sister-in-laws and some panchyat members only lumberdhar. So, do not worry if it is your real marriage and you know about each other deeply. Like what you like to eat. In my interview, they asked me this question like what my husband like to eat and I told them. . Now, I am in USA with My son and my husband about for four years now, and I got my citizenship few days ago. I am very happy here with my family.
Best of luck.