Not strictly an embarasing story, though it had the potential, and I'm sure I'll find it funny... eventually... maybe after a couple of decades...
It was a tranquil Saturday morning, nice cosy weather in the spring. I was lazing around in bed, playing with a butterfly, just generally enjoying myself. I had only just received it, and with a fresh pack of batteries they were pulling quite a punch. Then out of nowhere, there was two loud bangs and I snapped up to find my mother bellowing at me next to my bed.
Apparently I forgot to lock up before going to sleep (again), allowing her to open both the screen door and the actual door, then barge right in before I could even react in my hazy state. Fortunately, the butterfly was harnessed on and hidden underneath my clothes (foresight!). So there I was, on the verge of getting off, while my own mother unsuspectingly ranted about some business trouble she's having with her partner, in between berating me over my sleeping habits and choice of attire...
One of those rare moments of my life when I'm glad my mother is so extremely self-absorbed and noisy