My Penultimate Secret!

When my Dad get married,
My Mom was 18.
Huh, my Dad was 35.
Not bad Dad,
We lost you last year…
It could have been great support for us to have her with us,
To solve our differences that life has sowed upon us.
But why Dad,
She died even before 6th anniversary
Of your wedding?
I’ve to die with this query
As we have buried that secret with you..!