What is the main conflict in Excellent Women by Barbara Pym?

As the daughter of a clergyman, Mildred is well-versed in the needs and traditions of the church. Having grown up in a vicarage, Mildred knows the importance of service. Unfortunately, that characteristic often takes over and Mildred spends a lot of time doing work for other people instead of focusing on her life and relationships. While service is an admirable thing, Mildred often takes it to extremes and many people may see her as being one who interferes in other people's business. Mildred begins to realize this when people begin to request help from Mildred in areas with which she is not comfortable. At one point Mildred tells a friend that she is tired of taking on other people's burdens.