Big Hugs! Your wife is really pushing this fast. I hope maybe the mediator can slow her down. But, it's normal to feel this way. Geez, it's only been almost 2 months since BD, give yourself a break. That was my toughest thing. Giving ME a break. I would get so mad at myself for each little backslide or feeling.
Try to remember, feelings don't have to turn into action. You can calmly state that this is not what you want. That you do not want a D at this time. Others may have a better suggestion.
We have really good friends who D'd and remarried a few years later. It was the wife, she rushed it. No A, but it does happen.
M: 9 yrs T: 13 yrs H:34 Me:35, S4, D2, S 7 months Dday 11/12-PA & multiple PAs Dbing 12/12 S 1/13 7/13 H moved back in basement. 8/13 #3 born 10/13 still cheating 10/13 He moves across country, I file for D