I feel sorry for her. There is an unfortunate element here who go out their way to post nasty things with little thought to the impact their opinions may have. It is all about their need to stir, goad and be extreme. Often these views are ill thought out and these posters are unable to substantiate their views, when challenged, with any real evidence.
Why would anyone criticise a person returning to work at a time of their choosing?
I wouldn't consider it my business. It is just unsupportive to other women and anti-feminist.