Tina and Danny have been married for 12 years. Both are working and have busy schedules, but at the end of the day, they sit together and tell each other about their day. They have had their share of ups and downs in life, and their love for each other has grown steadily. However, Tina, although very happy in her marriage, reminisces about and wishes to have the passion they had in the early days of their marriage. According to Robert J. Sternberg's triangular theory of love, Tina and Danny's relationship is mostly likely categorized as