Purr, It does sound like your wife is trying to cover her tracks now that the om's wife is on to them. I hate to say it, but they all lie to cover their tracks and they will tell you that they didn't hook up until the relationship has soured and they've separated from you. Timelines are changed to suit their needs.
I'm very sorry she continues to lie. You are going to have to find a way to lower your expectations to zero and remember that when they are in crisis, they will do anything to protect themselves, right down to lies that make absolutely no sense. She's acting like a teenager and what do teens and kids do when they are caught w/their hand in the cookie jar? They point the finger at others and will not own up to their own mistakes.
Purr, I know it hurts, but do not allow it to fester in your mind. Let it go and just distance yourself from that situation for a while, if you can. You need to take care of yourself and keep the focus on you. Allow your wife to swing in the wind for a while. She needs to do that for a bit.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
