* there's a whole other thread I created a while back on SAHMs and daycare. I don't want to repeat a whole thread but basically 1-2 days off if you pay for it yourself good on you. Or if you have medical issues/ pre-school aged child and can't get a preschool spot then using daycare with government help is understandable.
* I just think spending excessive time studying something you know you aren't going to use/work in is selfish and indulgent.
* it sounds like there are other issues with your friend. Have you asked her for details/if she needs a hand? Perhaps the baby only wakes once but it's for 3 hours. Perhaps your friend has pnd?