Sorry if it was a genuine question, OP. Most of the time those kinds of questions are from half-assed journos doing 'research'.
I think this remark was due to me having not let myself go IYKWIM but just because I take care of my appearance doesn't mean I don't take care of DD... she has a bedroom full of toys and it's beautifully decorated, she has a cupboard full to the brim with clothes, she has three winter coats, a few pairs of shoes
Well, you'll know best whether your MIL was being spiteful. I agree that taking care of your appearance doesn't preclude taking care of your child, but at the same time, your response is all about what toys and clothes your DC has, and how nicely-decorated her bedroom is - which I think are largely irrelevant. I mean, it's perfectly possible for a child to be desperately emotionally neglected while having a lot of shoes, toys and three winter coats. I'm not suggesting you are doing that, only that it would be perfectly possible to be a horrifically bad parent while your child owns a lot of shoes and coats. Emotional neglect doesn't have to involve physical neglect.