Being a stay at home mom is not being a lazy good for nothing. A baby takes a lot of time and attention. Add taking care of a house on top of those things and you have a full time, low paying job. Speaking of low paying, your GF would probably have to find a fairly high paying job to cover the cost of child care while she is working and still have money left over to help meet expenses. If all of her wages go to pay someone else to take care of your baby she may just as well stay at home and raise the child the way you want. It is true you will be working hard to make money to take care of your family but she will also be working hard to take care of your child and you.