That is some story.
My parents had a 20 year age gap. When they married she was 21 and he was 41 back in 1982. She worked in a bar that my Dad owned at the time. Apparently it was love at first sight. They have a happy marriage that did have it's ups and downs but they stuck with it and are still going strong 30+ years later.
My Mom never knew her Dad and I know my Grandma at the time wasn't happy since she was the same age as my Dad. It was a little weird growing up when I had new friends come over but other than that we were just a normal family.
I do have to say though that I am attracted to guys more my age. They can be a little older but no more than 5 years.