My parents are currently celebrating their silver-"golden" anniversary (they were married on the 25th and it is their 25th year of marriage), but for a while I was worried that they would split up once my sister and I moved out. I worried, because I found out some *ahem* things that they did to spice up their love life.
It seems, however, that an empty nest has done nothing but strengthen their bond.
Sometimes people can't stand to be together (like my aunt and her ex), but patience from the child makes things so much smoother for everyone. Have you expressed your feelings to them?