PLEASE DONT RESPOND OP... for the following reasons.
There's an old saying "If the cap fits, wear it." if you respond you will be technically acknowledging that this coward is talking about you.
You've said no to her and now she wants to make you feel the sting of her retribution
She will get a kick out of your responding because, being saintly, she didn't presume to disclose your name. in replying you disclose it yourself.
She's hoping to start a gossip tree from this...getting people to DM her.. and saying to them.. Look at the cheek of her reply.. All the while portraying herself as a wronged woman.
This is the marvellous thing about saying no to Cheeky Fuckers..
They try to punish you by "Distancing " themselves ( how very magnanimous of them!) but what they don't realise that this is usually a blessed relief when they do. No more pressurising and bullying.
PLEASE DON'T SEND HER A LINK TO THIS THREAD... She will just up the ante by saying .. "Not only did she let me down, she got hundreds of people online to write hurtful messages about me. I'm broken."
Ignore, ignore, ignore...will drive her madder in the long run, she wants your engagement in this nonsense because she can't continue dole out her retribution for your disobedience if you don't let her and her distancing you is just brilliant result for you.
If she starts slagging you off to mutual friends, just ask them if they would lose four days of annual leave to look after someone else's 19 month old whilst their parents are abroad on a work event.
You know you did the right thing and knowing that is enough.