Yes...I think if you tell her how you both need to see where and what the future holds for your R - in a gentle way to her, reassuring that it's not an attack mode to her way of thinking...she will go. She's scared that she will be assessed as a person with irrational thoughts and that the counselor will "see" through her...you know that look.
By all means...say something to the effect of...you know, I really went out of my way to cook something special for the whole family, the kids enjoyed it and yet you cannot even respond with a simple courtesy that you liked it, hated it or felt more spices were needed. Why do you feel the need to treat me like I'm someone with whom you can't stand to even talk to...something along those lines. Whatis, you really need to address this with her - soon.
Keep prepping her to go with you to the counselor...