The Museum of Fine Arts, Bostons Curator of Paintings Erica E. Hirshler shares her expertise with us during Saturday Afternoon Lecture: Sisters of the Brush and Palette: Mary Cassatt and Her Contemporaries. Hirshler discusses Cassatt and other women painters of the late 19th century, who enjoyed never-before-seen opportunities as female artists. But their new freedoms were marked with continued gender discrimination. How did their place in society influence their paintings? How did their success affect the art world? 1:30 p.m. Friday, 4 p.m. Saturday. Museum of Fine Arts, Houston, 1001 Bissonnet. For information, call 713-639-7300 or visit www.mfah.org. $3.50 to $7 (includes museum admission).