Threats.

"I did you a favor by getting you married to my son even when you had another man's child. The man wasn't even ready to marry you then, so you should have been grateful to me, but instead, you repaid by goodness and kindness with this betrayal. You went ahead to cheat on my son, and not only that, you got pregnant with a bastard. How did I even fall for your evil tricks?" the old lady inquired in anger.

The woman chuckled loudly as more tears drooped from her eyes.