Book where woman steals a kid

There is this book im looking for where a woman steals a five year old girl from a woman at a store and people blame the mother calling her a "bad mummy". And the girl doesnt love the woman and ruins her image of children. Might be a British or Australian book. Not Tarryn Fisher's Bad Mommy, i checked.

Maybe What Was Mine by Helen Klein Ross?

No, but its close. If it helps i remember that she had other kids (maybe just one im not sure) and people were saying she deserves to have the others taken away