Is it normal that old incidents take shape of desires

When I was in teens, I happened to see my aunt fully naked. But those days I was not so much inclined towards romance or sex. As the years passed my aunt's relationship with her husband declined primarily due to age difference. my aunt is same as my age and I know that she is not satisfied with her sexual part of life and so is she getting into emotional vacuum. I have been constantly in touch with her but off late I have started feeling that may i could do something. Whenever I think of her, I get reminded of the naked scene. Is it ok and should I progress any further in this direction.