To think people should, in the nicest way possible, STFU about the childcare choices of others?

[TerraNovice]

I've recently returned to work, as has another woman in my office, 13 months after having our DCs. I enjoyed my maternity leave but am glad to be back at work and have found a good nursery for DS who has settled well there. Other woman in my office is having a bit of trouble adapting to being back as her DD has not settled so well in nursery and she feels a bit guilty for leaving her there when she's upset in the mornings etc.

Anyway, another woman in the office (who is something of a busybody) has said several times that she can't believe we area saving our babies in nursery and "it seems criminal" to put them there. It doesn't bother me so much and I told her there's nothing wrong with nursery, but my other colleague was a bit upset. She has no kids but wants nothing more than to marry a well-off guy, have his babies and quit work. That's fine if that's what you want, but she can't seem to understand that it isn't that simple for most of us. WIBU to tell her to fuck off next time she starts sprouting her words of wisdom?

Definitely being reasonable.
She sounds a right twunt

YANBU, I had to put up with a lot of exclamations of horror from various relatives when they realised DS would be going to nursery and they still talk about it in grieved tones. My DM told me several times that he would probably cry a lot at first (like that hadn't occurred to me??) but fortunately he loves it. I ended up telling them it's nursery he's going to, not borstal!

I would just say "I hope you remember this conversation in a few years time when you have your own kids and you feel ashamed of yourself."

YANBU to say something back to her, to keep it professional though I'd go with one of the above while thinking 'fuck you'. Maybe talk to the other lady, see how she feels too- maybe you can think of things for both of you to say and make it clear she should STFU.

It is very easy for non parents to talk about the nirvana of their own future parenting.