41 isn't too old to have a baby. But, as you work two jobs, and have two kids already, are you willing to give your work up for the new baby?
If you are, and can afford to, then fairplay. If you're going to ****** off back to work immediately, then I don't think it's fair.
PLUS at the age of 41, how come you aren't mature enough to decide for yourself, whether YOU are ready for another baby, and why feel the need to ask a load of randomers on an internet site?! Surely you should make up your own mind! Grow up.