Sometimes we need to be the bigger person. We need to find our moral compass and regardless of how good or how right these intense feelings may "seem", we need to do what is right.
You are going to be labeled the homewrecker and your lover's daughter will forever be scarred by your relationship with her Father because of the devastation it will cause to their family.
But then again, what do you care? You only care about your happiness.
I guess when your Husband cheated on you there was no pain on your part, no anguish, no feelings?
Have you forgotten so quickly how you felt when you found out about the OW in your marriage?
It is nice you wanted to share your perspective here, BUT you need to remember that you are posting in a place that is full of hurt and wounded people, most of them having had their lives turned upside down because of an affair.
You will not gain much sympathy here and will more then likely be the scapegoat for all of the pain people like you cause to the LBS.
Although it was quite brave of you to post, I don't think anyone really cares much about what the OW/OM thinks. They just want them out of their own marriages and to leave their family alone to heal from all of the damage caused.
Do the right thing....
Search your heart....
Walk away.
There can be no testimony without a test. I am praying to go through this test and come out the other end with a new and better marriage then before.