LA/SP,
"When OM is gone we will gladly come down."
"That will not happen and I will spend time with Ty no matter what it takes. It is not fair that you are keeping him from me."
"You are saying that you feel it is unfair that your affair has divided our family, is that correct?"
JMT
This is important. I notice that you frequently paraphrase what your wife has said, but do so by turning it into an attack. In the example above, she was clearly NOT trying to convey that she feels it is unfair that her affair has divided your family. By deliberately twisting her words, you are alienating her further. Do you see this? If you look back on your posts here, I think you will see that you do this OFTEN.
What do you think she was REALLY trying to convey to you? Perhaps that it hurts her to not see her son? Perhaps that she wants to feel that you are willing to be fair with her?
The way you mis-paraphrase her is definitely unfair and unjust, and unlikely to do anything but hurt and distance her further. If that is your goal, then no need to change it. But if you want to heal whatever it is that has caused her to distance from you in the first place, you will have to start focusing on what she needs that she is not getting from you. Understanding and fairness might be a good place to start.
If I had said, "That will not happen and I will spend time with Ty no matter what it takes. It is not fair that you are keeping him from me," you might have responded something like this:
"Honey, I do understand that you love Ty and need to see him. I promise you that I'll help with that, but it hurts me to think that you might take him from me. Can we arrange for you to see him with me there, too?"
Does it sound too passive? Does it sound like you wouldn't be sticking up for yourself? Because your goal right now needs to be to be there for her, NOT to try to protect yourself, not to try to win.