That is totally cool! For me and my hubby it is 15 years so far and it seems like a long time but 77 years is forever. We would be 96 years old by then.
I looked around the site a bit and it looks like "Pop Lewis" passed away earlier this year with "mom lewis" passing away in 2002. 77 years together is a long time. She was 92 so they got married when she was 15.