Why does Tia Lola think Blance was a terrible mother?

Tia Lola thinks that Blanca was a terrible mother. If Prieto and Olga did not parrot what she taught them, she found flaws. There was no room for Prieto and Olga to be their own people. In Tia Lola's opinion, that does not make for good mothering. Then she just disappeared and did not let anyone know where she was. Blanca did not have the mothering gene.