I still don't want to have a long, drawn out discussion...but I'll have to wind myself up for one soon.
Why? Why not say, "We can discuss this with the family counselor. Why don't you make an appointment?"
And then, to whatever she says in response, repeat "We will discuss this with the family counselor. Why don't you make an appointment?" (Or, if you've been seeing one and she hasn't, "I will not discuss this unless you come to the counselor with me.") Memorize your phrase and repeat it, every time.
And don't JADE! That's probably the hardest thing for us people-pleasers to do... I speak from experience!

But when we Justify, Argue, Discuss, and/or Explain, we're just giving them more ammo to use against us.
"We can discuss this with the family counselor. Why don't you make an appointment?" or "We can discuss this with the family counselor. When are you coming to an appointment?"
"But I can't affoooooord it!
Repeat your phrase instead of allowing yourself to be distracted by a discussion about finances.
"Oh, you're so meeeean!"
Repeat your phrase instead of allowing yourself to be distracted by an am-not-are-too discussion.
At some point here, you can change your question to "Have you made an appointment with the family counselor yet?" or "When are you coming to the family counselor with me?"
I know this is going to be hard. The first time I managed to do it, I think my pulse was about 120! But it gets easier, I promise. I realized at some point that I was
training my Mom to stop using emotional blackmail. That made it easier, somehow.

EvilRoo suggests "Shall we have some whine with our dinner?"

I shall now stuff her back in her cage.
We're all standing by with the E-hell patented Shiny Spine polish!