If your ex told you they were having a baby with their new partner because they are exotic looking and smart, would you be hurt by this?

No. I would say something very complimenting. Like, I always knew good find someone more suited for your tastes. Then smile big and walk away knowing they are going to be thinking about that for a long time trying to figure out if that was a compliment or something rude related to something they said, either way you win by not being trapped by them for years and years because of having a child together and in knowing they now think you are smarter than they have you credit. 😊you're welcome.