Child support is based on 2 things mainly:
1) Number of overnights per year with each parent
2) Income of each parent
Here's a calculator much like the one that courts use to determine child support:
http://www.pennglazier.com/support2006/support.html
I'm sorry about the infidelity, Pennsylvania is a no-fault divorce state, meaning courts won't look at who's fault the divorce is. Courts won't care if she smokes.


