Surely if the young Woman is of legal age, and chose to be in a relationship with a Man who is in their late 40s, should it not be okay? Albeit, there is a... sense of animosity, and slight disgust, from Women at even the thought of this.

Understanding the power dynamics at play, this was a choice, made by the both of them. Both are adults; regardless of brain development. And are mature enough to see the relationship, until it's end. The end of course being; that Legendary, and oh so special, Quarter, Century Mark.