I do agree with Eko to an extent. Though, I believe every personal situation is different, and Op, I don't think you would be completely privy to the complete scenario in regards to this person.
I also think this is a massive system failure. Women are expected to make ALL sacrifices and to be held accountable for everything family/child related and then criticised for it if they do different to what is deemed as socially acceptable. Whilst most people wouldn't bat an eyelid at the father making the same choices, women are seen to be an ogre for doing such a thing.
With all this said, for me, *I* have made the choice to put my children as my priority. This is the right thing for me. Just because this is good for me, I totally get that this may not be the right thing for someone else!
All in all, I think this would be a tough decision and one not made lightly!