If you suspected your Israelite lady was cheating on you, it was probably with a man of a higher social standing. Like the priest.
So you take her to the priest, he thinks "Okay, I think I remember creeping with this bytch. Better give her the red potion."
Now nobody's the daddy because the woman miscarries, nobody has to get divorced, we can blame the woman, society remains intact.
Unless you believe ancient people didn't fukk around on each other.
So this hypothetical priest you're talking about doesn't even believe in the test, doesn't think God is the judge of the test, but just fixes it himself.
Dude who doesn't even believe in God is out there wrecking families with his sexual promiscuity, defrauding husbands, and then using abortion to cover up his sexual indiscretions.
Sounds like you have a low opinion of atheists.
(Again though, since you haven't produced any evidence that the test is about abortion or that the woman is even pregnant, the point doesn't work. Look at the quote above - how could the test be delayed for one, two, or three years if it refers to pregnancy?)