Gifts were meant to be given, whether wanted or not. It was a core facet of her being, like breathing or laughter. In the blood, quite literally.
She was never sure who had it first. There was just enough pegasi in her ancestry that it could match up to myth and legend. That felt too neat though, like one of those store wrapped gifts, all pretty looks but utterly devoid of personality. No, life was messy.
Nana had the twitches, of that she was sure. She bore her name, her mane, and her secrets. All of them. It had skipped her mother, you see. Nana had tried to coax it to no avail. Grey in coat and grey in personality, her mother lacked, and it stung Nana dearly.
Then she'd popped out one blustery morning, and joy blossomed. Nana Pinkie always believed there was no greater gift than the future.
So, Surprise is canon (or at least an in-universe myth) to the Reflectionverse... Wonder if any other G1 bits survived all that time?
Given Cloudy's name, I figured "Nana Pinkie" was a nickname for a mare named Rose Quartz. (Plus, "Granny Pie" was clearly Pinkie's paternal grandmother, so it works out nicely.)
This led to some... interesting wrinkles when Steven Universe came out.
In any case, yes, the Pink does seem to run in the family.