This gushing review about Pinter's The Homecoming had a reference to Stein growing to resemble Picasso's portrait of her. In searching about it, I found:

"Only a few years ago when Gertrude Stein had had her hair cut short, she had always up to that time worn it as a crown on top of her head as Picasso has painted it, when she had had her hair cut, a day or so later she happened to come into a room and Picasso was several rooms away. She had a hat on but he caught sight of her through two doorways and approaching her quickly called out, Gertrude, what is it, what is it. What is what, Pablo, she said. Let me see, he said. She let him see. And my portrait, said he sternly. Then his face softening he added, mais, quand même tout 'y est, all the same it is all there."

Gertrude Stein, The Autobiography of Alice B Toklas