My wife Fiona has is a very vibrant red head, so there is a clue.

Lady Of The Flame Red Hair

My lady of the flame red hair
Like a sunset bright and strong
You lead me where I long to go
Where I can do no wrong

My Lady of the flame red hair
It is love that's good and true
And no matter if you say farewell
I will always look for you

My lady of the flame red hair
Do you think now we are older
That time has left his scar on us
Or that time has left us colder

My lady of the flame red hair
We are neither young nor old
For the mark of life is on us now
And we have ourselves to hold