BB FANS

Dear Dr. Phil,
I need some advice.
I've suspected for some time now that my wife has been having an affair.

The usual signs. Phone rings, I answer, someone hangs up. She started
going out 'with the girls' a lot recently although when I ask which
girls it is always "Just some friends from work, you don't know them".
I always look out for her taxi coming home but she always walks down the
drive although I can hear a car setting off. As if she has got out of
the car round the corner.
Why?
Is it not a taxi?
I once picked her mobile up just to see what time it was and she went
berserk and screamed that I should never touch her phone again and why
was I checking up on her.

Anyway, I have never approached the subject with my wife, but last night
she went out again and I decided to check on her.
I decided I was going to hide behind my car which would give me a view
Of the whole street so I could see which car she gets out of.
It was whilst I crouched behind my car that I noticed rust around my
Rear wheel arch.

Should I take it into a body repair shop or should I buy some stuff from
B&Q and try to repair it myself?
Help please,
Martin.