You cant. If he entered illegally, the only way to make them legal is to marry them and file a I-601 in their home country and hope it gets approved (but travelling outside the US creates a 3 or 10 year bar to reentry). Otherwise, he will always be subject to deportation.
Becoming legal by simply marrying a citizen is among the top 3 misconceptions in Immigration. It simply isn't true.
yes she gets deported..
Yes.
http://www.vdare.com/mann/reporting_aliens.htm
Perhaps, but the mother should also be charged for harboring an illegal alien.
Unfortunately, an illegal alien can not become an US citizen if they have been deported before. If they have a felony, they can't become a US citizen either.
yup.
not the mother nor the baby
Can an illegal alien who was deported and barred for ten years come back sooner by marrying an us citizen?
No it cant cuz it was born here
Of course! Being married does not affect one's legal status, even a legal alien can be deported for criminal activity.
Either scenario is possible.
I believe that if your child is a US citizen you cannot be deported. You need a lawyer.