Your boyfriends ex-girlfriend shouldn't be giving him problems in the first place. Your boyfriend needs to stand up for himself, instead of letting his ex-girlfriend win. It might sound hard, but actually it is easy. Also, think how the child is feeling always having to listen to arguments.
Yes your boyfriends wife can demand a D.N.A done on your child. even if you are not legally divorced.
Yes she can. Neither one of you can dictate to the other who the child is allowed to see or not.
"lieu" ... only with the court's approval
no
For a severely disabled child, support often continues into the child's adulthood.
no
The police can bring the child back to his father since the court order says it is his weekend. The mother also have a responsibility to make sure the child is brought back and can not break the court order.
Emphysema is not contagious, and someone with emphysema can be around a child with respiratory problems without endangering the child. Smokers should not be around a child with respiratory problems.
contact the court
That would depend on local legislation and who 'you' are.
In some states, 20% of your income can be used. see link
With the biological father's consent, yes.