Short answer: She will act differently with her friends because they were brought up differently. Different friends have different upbringings and therefore different personalities and will create different experiences. After time, these memories will become mixed because that is how the human mind works.
Long answer: Blaeser can have a double life because she will act one way with her friends and another with her family. Because she feels safe and comfortable around her family, she can share certain things that she would not say around her friends, but around her friends, she can tell more jokes and get different opinions. Her family will be biased because they are all in the same family and therefore have had similar experiences, so her family will answer similarly to how she thinks about her questions. Her friends have grown up in drastically different ways and will have a very different outlook on her question. Her memories with friends will be unique from those of her families. Once again, her friends have been raised differently and will create different experiences around her. The memories with her friends will mix together and she will have many different experiences with her different friends.
