Great Regulars: The speaker addresses her beloved;

she exclaims, "Yes, call me by my pet-name!"--which indicates that he has, perhaps out-of-the-blue, called her by that name. Her reaction seems to surprise her, and she encourages him to continue to call her by that name.

She remembers that as a child a family member (or some other person whom she loved and respected) would call her by her pet-name "from innocent play", and she would come running, "leav[ing] the cowslips piled."

from Linda Sue Grimes: Suite101.com: Elizabeth Barrett Browning's Sonnet 33

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