So let me get this straight:
She got a 10k pay rise earlier this year.
He tells her all the time how valued she is
For Xmas she got a 2k bonus and a basket
And she's whining another girl took the pay rise in lieu of the bonus. She does understand the premise of this choice right? That this girl didn't get a bonus.
Frankly she'd be doing you a favour walking. Her true colours have come out by the sounds of it. My DH would be doing backflips over the bonuses your DH offers. She sounds like a childish prat.