Why not?
The mother had an apparently longed for daughter. She brought her up, maybe the daughter even had children of her own, the mother’s grandchildren. And the minute she found out she wasn’t actually biologically her daughter she threw her aside and embraced the real thing.
Do you think people should be that disposable?
Let’s imagine you found out now that one of your children wasn’t yours? Would you cheerfully hand it back and embrace the real deal? Really?
It would be one thing to find out the truth when they were still babies. But the way that Jessica was tossed aside, essentially thrown out of the family, it’s clear she was never really wanted in the first place.
So yes. I judge. I don’t judge someone for potentially wanting to find out the truth. But I judge a woman who suddenly find out she has a new daughter, and swaps the old one out to live out her dream.