Affairs get a negative press in Anglo-Saxon countries, where they are discussed in terms of infidelity, adultery, cheating, dishonesty, and betrayal. Four-fifths of people in Britain condemn affairs as always wrong - even though two-thirds do not regard sex as a central part of marriage.
You're divorcing your spouse, not divorcing your kids. Separation is hard to swallow for children that have a loving relationship with both parents, and usually, a divorce leaves emotional damage behind. You may be eager to move on, but for your children, it's important that divorce is handled delicately and with them in mind - stability is crucial.