According to the provided Recapy summary, she left because she "couldn't endure poverty" — in other words, financial hardship and an inability or unwillingness to tolerate a poorer lifestyle led her to end the relationship. The summary doesn't give further specifics (e.g., whether it was debt, clashes over spending, family pressure, or resentment about his career focus). If you want scene-specific details or the exact circumstances, share a passage or ask for a spoiler-level recap and I can summarize from more complete context.
Sources
Provider metadata
Tap to read source excerpt