Familes that are still together

My in-laws will be 51 years in December, wife and I will be 32 in July and tomorrow would be my parents 56 if they were still alive. Throw in my brother at 26, and my wife’s brother at 20 for good measure if you like.

My parents were friends for a few years before they got married, wife and I were friends for a few years, at some point we were like are we dating?, and my in-laws got married in high school because my wife was conceived when they were 15/16