I had something similar happened years ago
A work colleague was struggling to find childcare for one day (the morning) and work where being nasty and insisting she came in,but she couldn't as lack of childcare
I happened to have the day off and offered to have him
Next thing I know,I'm having him every Monday and Tuesday,she had a word with the male boss (who's never had to worry about childcare as his wife does everything bar wiping his arse) about me working for her on those days and I was lumbered with her other 3 kids school runs,her housework and having them all at all hours (including overnights) all unpaid
I was missing out on my own work (I needed the money) and was being taken for a mug,so I told her I was stopping it
She went insane,started a smear campaign against me and male boss joined in and tried to give me a written warning (my biggest regret is telling him to do so as I would take legal advice-i should have let him do it and then taken legal advice)
My colleagues stuck up for me so main boss made her a manager (she was useless but had a tiny bit of power over me)
One Tuesday,I was leaving and said bye to everyone and left-she was there,glaring at me
The following day,I showed up,did my shift as normal and heard the rumours about how she'd gone home and found her husband in bed with another woman and had left the house with the kids
It turned out he had a whole other family a few miles away (who knew about her) and he'd been living a double life for years
She'd quit between me leaving on the Tuesday night and starting again on the Wednesday afternoon
(She was a two faced bitch anyway-she worked her way around most of the male bosses to climb her way to manager behind husbands back)
Can't say I was too upset and nobody will ever take advantage of me like that again
I grew up in abusive home and everyone else's red flags where my normal-im not the people pleaser I used to be anymore (thanks to dp who points out the pisstakers)