Thanks for all the useful advice in regards to my dilemma. Well, I did it. She parked in front of me at school this afternoon so I hitched up my big girl britches, took a deep breath, walked up and tapped on her car window. She probably thought I was coming to rant over something, it would be a bit odd to find a Mum you don't really know tapping on the glass.
But I did it. I 'fessed up, told her I'd spotted her blog, thought she was pretty damn spiffy, and wasn't some sort of stalker nutter. And told her of the blogs we have in common, and my blog identity.
Hope I haven't spun her out too much...
And no, I won't add a link. It is up to her if she wishes to reveal who she is.