Earlier quoted context omitted.
It's always worth considering whether you have people who will give you genuine glowing references. I've only ever once been at a place where there was a policy saying "all you are allowed to say during reference checks is "yes, they worked here as [job title], from {month/year} to {month/year}". And even with that policy/restriction I still found ways to be much much more positive about the people who were genuinely…
Congratulations, you cost her the job because the company didn't want to deal with an increased risk of her being poached. She's suing, by the way.
(We still catch up for coffee every 6 or 12 months.)