Chantal got married young, tried to work it out, it failed, she got a divorce for whatever reasons. Divorce is usually the last straw and the marriage crumbles before that.
Emily is not Mother Teresa..she was a teenager who got pregnant out of wedlock. In many families today, that is scandalous behavior, whether it was 'the love of her life' or not. She will never know if they would have lasted either, cause he sadly died.
Funny how Emily being a pregnant, unwed, teenager is never mentioned. Now I find that weird.