stunned but in a good way

In a moment of 'madness' you might, like me have signed up to a site making connections with folk you might have known.
Sometimes connections are made and friendships renewed. Often the whole thing is a flop so you ignore it.
Recently I had an email saying there was a message, but I didn't recognise the name. Eventually curiousity got the better of me...

Stunned, I needed to read the email several times before it made sense.

Then memories of long ago came flooding...
Sunday afternoon walks across town to have tea with friends of my father. A vague memory that they had two children much older than me. The daughter trained as a teacher and her college uniform was purple and white.

Many years later, I too went to that college, but by now the purple and white was no longer a uniform but optional sweatshirt and scarf. It was no longer girls only, but co-ed.
So, who's the mysterious email correpondent? The grandson of the couple I had Sunday afternoon teas with so long ago!!!