Mary Phelps Jacob married Richard Rogers Peabody, a member of a prominent Boston family. This union solidified her social standing and provided a foundation for her future endeavors, although the marriage would eventually prove to be troubled.

Caresse, as she now was, continued to participate in high society events while exploring her own interests. She began to cultivate a circle of friends who shared her artistic and intellectual inclinations.

During World War I, Caresse engaged in volunteer work and supported the war effort. This period exposed her to different perspectives and contributed to her growing independence and social awareness.

The marriage to Richard Peabody began to suffer due to Richard's struggles with mental health and alcoholism. Caresse found herself increasingly isolated and sought outlets for her creative energy.