per my knowledge a child born during the marriage is both party's child as where he may not get full custody he maybe able to get join custody
* The best thing to do is see a lawyer and your husband's lawyer and your lawyer will decide who gets what and if any children are involved who they will live with or if there will be joint custody.
As unfortunate as this may be it is possible for the father to get custody of the baby, but not full custody unless the mother is proven unfit. Because reguardless of what happened between the couple the father is still the father of the child, and the father still has his rights as a father to be a part of his child's life.
His rights to the children do not change, but he leaves it open for her to file for custody based on possession or abandonment. He should never move out unless ordered to do so by the courts.
if she leaves her husband for you.
yes
Sole custody is not common these days except for single mothers. see links
The wife should ask the courts for an order for spousal support.
Get a job
The non-custodial parent can file for custody.
if he leaves after dinner
Then she is gay.
an angry husband