Michelle Obama's Mothers Day Tea with Rosalynn Carter, Sex and the City Cynthia Nixon

First Lady Michelle Obama lavished emotional praise on her mother, Marian Robinson, at a White House Mother's Day Tea Friday, where the invitees included First Lady Rosalynn Carter and her granddaughter; also President Nixon's daughter, Tricia Nixon Cox, and Anne and Susan Eisenhower, President Eisenhower's granddaughters.

A little news came out of the event. Ms. Obama revealed that she and Mrs. Carter try to have lunch together when Carter is in town. And at some point, they are going to work together on post-traumatic stress disorder and mental health. Mrs. Carter's latest book is titled, "Within Our Reach: Ending the Mental Health Crisis."

For Tricia Nixon Cox, who was married in a 1971 Rose Garden ceremony, it was also a homecoming. Mrs. Obama said a photo of Tricia's wedding in the White House colonnade is a favorite of hers' and daughters Malia, 11, and Sasha, 8. Warned Mrs. Obama, "They're not thinking about marriage by the way. Don't write that down on a blog. They just like the picture."

Mrs. Obama introduced her mother -- who lives with the Obama family at the White House -- with zeal. "There's no way to quantify just how important these mothers, these women are in our lives. And there's no way that I could ever fully measure all that my own mommy has done for me. This is my mommy.

"This woman who tries to take absolutely no credit for who I am for some reason, she is my rock. She has pulled me up when I've stumbled. She's pulled me back when I've run out of line, talking a little too much. She'll snap me up. She really does push me to be the best woman that I can be, truly, as a professional, and as a mother, and as a friend. And she has always, always, always been there for me. And as our family has grown, she's managed to expand her love for all of us," said the First Lady. "And raising our girls in the White House with my mom -- oh, not going to do this --- is a beautiful experience. And the opportunity to have three generations living in the White House, it's beautiful. And I'm pretty sure the president is happy about it, too."

FOOTNOTE: When Susan Eisenhower endorsed then-presidential candidate Barack Obama in February 2008, her support -- backing from a well-known Republican name -- gave his campaign a boost. Her presence on the campaign trail helped Obama make the case to GOP and independent voters.

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