http://voices.yahoo.com/a-comparison-some-reflections-upon-marriage-and-304450.html

Namely in Montagu's letter to her daughter, you can see how the letter is related to past experiences, and her dialogues are about current thoughts on family.  She talks about how she raised her own daughter to be ready for marriage.  But that her granddaughter should be raised differently, wanting other things. Point being, her instructions and advice are on the same topic throughout, but she has a different opinion on how to raise children!