i need some advice

I need some advice on what could be a life changing decision:

I've suspected for some time now that my wife has been cheating on me. The usual signs. (Phone rings, I answer, someone hangs up, etc…).

She started going out with the girls from work 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 driveway and I can hear a car driving off like she got out of the car round the corner. Why?

The other day I picked her mobile just to see what time it was, she went ballistic 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. I think deep down I just didn't want to know the truth but last night she went out again and I decided to truly find out.

I decided I was going to hide behind my car which would give me a view of the whole street so I could see what car brings her home.

It was while I sat crouched behind my car that I noticed a scratch in the bumper next to my rear wheel!!

So, should I buy a new bumper from the dealer and get it sprayed or should I get Fix-A-Dent in to try and repair it?

Cheers