Confession is good for your soul.  It won't be good for her soul.  Suck it up.  If you talk to someone, talk to a person bound by confidentiality.

There is something missing for you in your sexual relationship with your wife.  Figure out what it is and see if you can fix it with her.  If you can't, you can divorce her or live in an "arrangement".  It's a collection of hard choices.  I and many other people here are struggling with the same issue.

I had twelve years schooling at Our Lady of Perpetual Guilt.
Everything concerning sex, even thoughts about it, was a mortal sin.

I was hasty in my previous post. It was a joke; possibly in bad taste, but Im catholic so I can bash me. From the sounds of it though you do need to step back and analyze what it is you want out of your marriage and life for that matter. I was married and took my vows seriously. It wasnt until after she passed away that I considered the hobby. When I was having difficult times in my marriage I talked about it with someone(a priest friend) who I trusted and accepted me and what I was dealing with without judgement(some topics should not be talked about with a SO)When I was going through the "wondering what it would be like" phase, I took every opportunity I had to make love to my wife and spice things up with all kinds of delicious goodies.ehehehe aaahhhh the memories She was ALWAYS appreciative; asking me what got into me. I was at the time always able to say "YOU!!!!"
So my advise is pay attention to take a look at your commitment and decide what is best for BOTH of you. [End of Sermon]

Depending on the fact that your wife is open minded... maybe you should drop some hints as to seeing her with another woman. If she is into it then you could always call another provider have the time of your life with two women at once and not have a guilty frame of mind.... If she really enjoys it maybe you two could make it a regular thing or even start swinging... Just an opinion from a Ladies point of view... Hope it helps..