This week’s “My Mother’s Wedding” stars Kristin Scott Thomas alongside Scarlett Johansson, Sienna Miller and Emily Beecham in a semi-autobiographical mother-daughter story that also serves as this

Thomas co-wrote the script with her husband, journalist John Micklethwait, which includes a particularly poignant monologue for her character telling her daughters, essentially, to grow up and move on — a mature and worthy statement that might come a bit too late. “My Mother’s Wedding” feels only partially realized.