According to the woman, who shared the story by herself on break_or_makeup, she concentrated the hot water on the other woman with her husband. However, she is now very bothered because since the incident, her husband has not come back home. She is now worried that something may have happened to him.
The angry wife caught her husband inside a restaurant with another woman and decided to deal with the pair by giving them the embarrassment of their lives. She boiled hot water and while it was still hot, stormed the fast food joint and poured it on them.
Below is how she put the story: