Answer:
Yes, there is a change in the speaker's thoughts about her friends.
The change occurs on the line that states "Until I noticed..."
Step-by-step explanation:
The word "until" marks a change in the account, which was a loving description of the two friends, until something changed that: the fact that these friends would follow the speaker when she carried Beatrice, presumably her child, to bed. This is a strange event, which also marks the change in the poem. What the speaker realizes is that, despite their apparent acceptance of having lost their parents at a young age, they seem to be stuck on that fact, taking the place of children as they seem the author being a mother to her child.