Thank you very much for your comment. It's true, times are changing and now live together is much more socially accepted than it was a few years ago, but older people or people more religious still don't look kindly on it.
Osvaldo's mother is a lady tied to ancient traditions, but she has chosen, for the sake of her son, not to raise any walls against him. After all, the two lovers will have time to get married and regularize their union.