Triangulation occurs when a parent requires a child to function as an emotional adult by meeting the parent's adult needs and wants. Were you required to give, give, give to your parent, or was your parent continually giving, giving, giving emotionally to you? In a healthy parent-child relationship, there is plenty of connection—but the parent never imposes their emotional needs on the child. Triangulation results in two deadly dynamics. First, your goodness is consumed by one parent. Second, as a result of being consumed by one parent, you are setup to be envied by the other parent. When triangulation is present in a family, it is common (though not inevitable) for the triangulated relationship to become sexualized. By sexualized, I mean that there is erotic energy between Mom and the chosen son or Dad and the chosen daughter.