Memorable romances involving married middle-aged couples

[pianocello]

This doesn't happen regularly but in Xam'd: Lost Memories ep 21, there was such a powerful romantic scene involving a married middle-aged couple that it brought tears to my eyes. Are there any other similar romances involving married couples of that age?

[Njr Scrawl]

Not sure if they're old enough, but Nanoha's parents are very romantic & in love with each other IMO. A continuous ongoing romance.