This explains a lot. I knew deep down as well. As a woman, I couldn't understand how there was no desire to communicate with you and very little with your sons. I felt, that her change in sexual preference must have been weighing heavily on her, and she was having difficulties coming to terms with it as well as probable backlash from friends/family. Her lack of communication was strange. I know there are many here who have very little communication with their WAS, but you have had none, and then the need for counselling. Not unusual again, but it all seemed to add up to me. Also, she never denied the affair, just didn't admit to it.
Well, as TTD says, it may be a faze. Can these things be a faze? or something that has been buried deeply for a long time. Now true happiness can begin for her. I know very little about these things. So now you know the truth. I wonder if she will ever talk to you face to face about it, now that she's out of the closet. I think she owes you that much.