What did the kiss symbolize between Norma and Pepe the first time it occurred and why?

The kiss symbolizes emotional blackmail. When Norma was only 12, her stepfather Pepe took the special attention he gave her to another level. While Pepe and Norma were alone together on the couch one day, Pepe teased Norma about never having kissed a boy before. Purely as a joke, Norma pulled Pepe's face toward hers and gave him a peck on the mouth. From that point forward, Pepe always reminded Norma that she had been the one to instigate their sexual relationship and that she was therefore to blame for betraying her mother and sleeping with her stepfather.