When I read Ocean's response....about the nights....that is very judge dependent and state dependent, it's not an automatic thing.
Spousal support is tax deductible income for you and taxable income for her. Child support is not.
A judge is more than likely to award Child support regardless of your arrangement.
Spousal support? haven't got a clue.
As for her moving in with someone -- totally totally irrelevant to the judge all the way around....particularly if you're divorced. What would become relevant is if she said "I can't work now because I have a baby" -- then a judge should impute her income to what she's making now or minimum wage IF both incomes are used in your state.
Play with your state's calculator. See what it asks for and what makes your obligation go up and down.
Health insurance factors in quite often.
Day care factors in quite often.
Extra curricular -- normally on the primary residential parent. (note I didn't say primary parent....
joint custody and 50/50 time, NO ONE is primary -- and the school will want a primary residential parent to determine school districts).
Tax breaks....what about that?
Medical co-pays, who pays that?