In the early 80's I worked for a laboratory that was doing DNA test to prove paternity. The problem that some of these "Moms" had even back then, was knowing who the real father was. You won't believe the low life bums some of these women dragged in claiming they were the "Dad". We had a couple of them that we had to do several rounds of DNA testing before they managed to name the "father". After having the "honor" of taking a blood sample from some of these creeps you wanted to go take a shower with the bleach to make sure that they didn't give you anything.
IMHO if a women is sleeping around on her husband and conceives a child, she is automaticly declared an unfit mother. The child can then stay with the father that has raised them as his or they can be placed in a home looking to adopt. That way these "mothers" will learn one of two life lessons. To either not sleep around or to keep their mouth shut if they do.
Exactly.
Make the mother name the "sperm donor" in open court, force him to take a DNA test, hit him up for child support and back child support to be paid as restitution to the man who was fraudulently paying for the paramour's offspring.