Marrying a deceased wife's sister to preserve the maternal care of children.

In South Asian culture, the Sali often lives with the married couple for extended periods. Whether she is studying, waiting for her own marriage, or helping after a pregnancy, the proximity is unavoidable. Repeated, close contact between a man and a young woman (the Sali ) who is not his wife creates a psychological tension. Writers exploit this "familiarity breeding attraction."

: Many storylines revolve around secret feelings or romantic tensions that develop between a man and his wife's sister, often leading to a "love triangle" dynamic.