There's also that White's tainted with Pink - or, maybe, with Red, producing a bit of Pink in her, just as Pink is tainted with White - or, rather, Red is tainted with White, producing Pink.
White didn't just blush - gems can blush. That's normal for them. White straight-up went off-color.
There's also the fact that Pink/Rose's character was wildly inconsistent and had odd mood and personality swings.