What are the motifs in Up at the Villa by W. Somerset Maugham?

Several of the characters exemplify the the idea of coming of age. Among those is Mary. Mary admits that she'd been giddily in love with her husband from the early days of their meeting. She says that she'd believed in their love so fully that she could overcome anything. Mary, looking back on her life with Matthew Panton from the vantage of her life after his death, says that she knew the pain of constant humiliation at Matthew's hands.