The Drowning Kinship

Every cat has heard the whispers.
The rumours.
They've seen the flick of her tail.
The twitch of her whisker.
But no one asks.
Because when they do, the elders fall silent, parents are suddenly called on patrol, StarClan looks away.

Still, one truth remains: Dacestripe changed.

The stony, calm, conflicted RiverClan deputy hides her pain well. She doesn't speak of the past. She doesn't show how deeply it still claws at her.
But every cat knows. Every cat can see her mask failing with each passing season.
And yet, their tongues become sand when they try and ask.
And those who remember the true, unforgiving story are dwindling.

So... what did happen all those moons ago?