"Joan would spend weekends there, visiting," in a home rich in culture, Marvin Jaffe said in an interview Wednesday.
Even at 7 or 8 years old, he said, she would be schooled by Kramer and his wife, a mathematician, who would "bring out books and pencils and do art projects" with her and other children in the household.
"Throughout her schooling," her husband said, Mrs. Jaffe "was going to after-school and summer programs at the Philadelphia College of Art," not for credit but simply "for enrichment."
Born in Philadelphia, Mrs. Jaffe graduated from Germantown High School in 1955, married in 1957, and earned a bachelor's degree in medical technology at the University of Pennsylvania in 1959.
"She worked for a couple of years at Penn, doing research in hematology," the study of blood and blood diseases, for a medical school professor there.
Mrs. Jaffe did not begin painting oil portraits of her children all at once, her husband said. "She would wait until the children were old enough to have their personalities showing through."
After she and her husband moved to Florida, he said, she took classes at an art alliance.
"She showed, small shows, down there," but never did commercial shows because she did not want to sell her portraits.
"She was giving them to her family" through the years, he said, so much so that "I don't have one in the house."
She was a member of Hadassah and the social group the Red Hat Society.
Besides her husband, Mrs. Jaffe is survived by sons Jonathan, Matthew, and Joshua; a daughter, Ondria Wasem; a brother, and 10 grandchildren.
A visitation was set from 1 p.m. Friday, May 17, at the Star of David Memorial Chapel, 40 Vandeventer Ave., Princeton, before a 2 p.m. memorial service there.
Donations may be made at www.hadassah.org.
Condolences may be offered to the family at www.starofdavidmemorialchapelnj.com.
Contact Walter F. Naedele at 610-313-8134, firstname.lastname@example.org or follow on Twitter @WNaedele.