I've read that Praskovia loved her eldest daughter Ekaterina to bits, but never liked her second daughter, Anna. Apparently when Peter the Great decided that one of his nieces would be the first Romanov Princess to marry a non Russian (as the bride of the Duke of Courland) Ekaterina would have been the obvious choice as she was the eldest sister. However Praskovia couldn't bear the thought of losing her beloved child and insisted that Anna marry the Duke instead.
I don't know anything about Praskovia's relationship with her youngest daughter. She does seem to be a very shadowy figure, completely outshone by her two elder sisters.
Though I think that the widowed Anna was bored and restless in dreary Courland she was at the same time relieved to be away from her mother's constant nagging and troublemaking.