Kinda like this?
My darling husband, Before you return from your business trip, I just want to let you know about the small accident I had with the pick up truck when I turned into the driveway.
Fortunately it's not too bad and I really didn't get hurt, so please don't worry too much about me.
I was coming home from Wal-Mart, and when I turned into the driveway I accidentally pushed down on the accelerator instead of the brake.
The garage door is slightly bent but fortunately the pick up came to a halt when it bumped into your car.
I am really sorry, but I know with your kind-hearted personality you will
forgive me. You know how much I love you and care for you my sweetheart.
I am enclosing a picture of the damage for you.
I cannot wait to hold you in my arms again.
Your loving wife.
P.S. Your girlfriend called.