Did you guys hear about this luncheon Teresa Heinz Kerry threw for Michelle & her Mom?

WASHINGTON — Marian Robinson, President Obama’s mother-in-law, moved into the White House “kicking and screaming,” said her son, Craig Robinson. She had never lived outside of Chicago and was reluctant to leave her beloved bungalow, her friends and family, her weekly yoga class and her familiar routines.

But after three months in the Executive Mansion, Mrs. Robinson is unexpectedly and decidedly savoring her new life.

She entertains visitors from Chicago. She attends White House dinners and concerts hosted by her daughter, the first lady, Michelle Obama. She dines at local restaurants and delights in events at the Kennedy Center, where she often sits in the president’s box and chats with performers.

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She has also become a familiar figure at the Kennedy Center, where she has watched performances by the Alvin Ailey dance troupe, the choreographer Debbie Allen and the jazz singer Kurt Elling, among others. (Mrs. Obama likes to joke that her mother has been to the theater more than she has.)

And she joined her daughter for lunch in March at the home of Teresa Heinz Kerry, the wife of Senator John Kerry, Democrat of Massachusetts.

“There’s no standoffishness,” said Judith Jamison, the artistic director of the Alvin Ailey troupe, who was invited to the president’s box at the Kennedy Center to meet Mrs. Robinson. “She’s very open.”

Sally Quinn, a Washington writer and socialite, who met Mrs. Robinson at the lunch hosted by Mrs. Heinz Kerry, described her as “the perfect grandmother you’d kill for: cozy, nice, sweet, friendly, dear.”

“It seemed to me that she’s perfectly comfortable in her new life,” Ms. Quinn said.