My parents had my older half-sister in their wedding, she and mom had "mother-daughter" vows. My mother made her dress (it weighs fifteen lbs), my dad made his garb and my elder sister's.
This is a picture of my grandparents' wedding in 1949. Although they have been divorced for nearly 40 years, they both died in 2011, only a half year apart.
Thank you for sharing this story and great photo with us! At the risk of sounding irreverent, I'm pretty sure I know what your grandfather was thinking when this photo was taken.