So you want to buy yourself some time and put off the inevitable...there is nothing wrong with that. I was at that point about 3 years ago. I can tell you that eventually a day will come when you will be ready to make that choice, or present her with the choice, as the case may be. As Mo keeps saying, you cannot fake it.
Meanwhile, let me throw this out at you. Fwiw, I think your wife is in a lot of pain too. She is very angry obviously, and this masks her pain, fear and frustration. You know her and your marriage better than any of us...maybe you have an inkling as to why she feels this way. This is about so much more than sex. Peel that onion, baby.