Esther presumably is referring to Mr. Marks when she talks about her love needing to be elsewhere, which suggests that she now sees that her marriage with George is never going to give her the emotional fulfillment she gets from her relationship with Mr. Marks. Moving to kiss Esther shows Mrs. Van Buren trying to take advantage of Esther and couching it in an attempt to make Esther feel better. Because Mrs. Van Buren has so much power over Esther, the kiss could never be one between equals: Esther will always have to defer to her employer.