Found it (read previous post for description):
My dear fiancee remembered me showing this photo to her prior to us shacking up together. It refreshed my memory bank and I knew exactly where to start looking, and it only took a few minutes to rifle through one of my storage bins before I stumbled upon it. Anyway, my mother looks to be having one heck of a good time. My cousin Billy was lavished with gifts from my Nana (my mother’s mother), as she adored him quite a bit. The bike my mother is riding was a gift from Nana. Here’s a photo from a couple of years later, in my grandparents’ back yard, with me admiring Billy’s cool yellow bike:
I was far too small to ever get to ride his bikes. By the time I was big enough, they were long gone. Anyway, I always loved those Stick Shift top-tube mounted shifters. They weren’t the best for boys if you needed to stop short, but man, were they cool….