I'd say that you did perfectly. You can always tell because they start to lose their minds even more when we stay calm and controlled. Some thoughts:
*Hold steady. When she starts escalating say the same thing every time: this is not productive and I'm not interested in continuing this discussion right now. Absolutely do not elaborate. The less said the better. A firm not going to do this now, and end the call, or walk away if you're in person.
*always act calm even if you're boiling up inside. you can melt down later when you're out of their sight/earshot.
*Do not allow yourself to get sucked into discussions you don't want to have.
* If it's something you would say to your kid for misbehaving, then it absolutely IS NOT something to say to your spouse.
Give me some situations and I'll try to give you an example of what I mean.
M 20+ T25+ S ~15.5 (BD) BD 4/6/15 D 12/23/16
"Someone I loved once gave me A box full of darkness. It took me years to understand, That this too, was a gift." ~ Mary Oliver