Jealousy Quotes in The Price of Salt, or Carol

How we cite our quotes: (Chapter.Paragraph)

Quote #10

For an instant there came the fantastic realization that Carol had devoted only a fraction of herself to her. […] Yet the fact remained, she had chosen her child. (21.42)

Is Therese jealous of Carol's child? Would that be an immature attitude to have, or would her feelings be valid?