All I can say is you cannot predict the outcome. There was recently some beautiful photos posted here of an infant baby girl placed on a female GSD that looked like it adored the baby. Other people I know say their dogs just kind of ignore the baby.
I only had two cats when my children were born, anything more than that would have been too much work, but then I had to work and help out with my husband's business from home. If you have a yard and don't have to work it may be possible.
I used to listen to the Dr. Laura radio show, and when people would call in with the question of one wanting kids and the other did not, she would recommend waiting until they both wanted children. You have a lot to consider...