That is a very good guess, IMO. It may be about attention. She sees the new baby getting fed by mom, clothed by mom, diapered by mom. All the while she is at the age to learn to use utensils and feed herself, change her clothes, and potty train. If it were me, I would let her show interest before pushing the potty training. Have her help out as much as possible with the new baby, and emphasize what a "big girl" she is, and what a "great big sister!"
When she sees that getting more independent isn't a threat to your love and attention for her she will be more comfortable. She still has plenty of time to learn.
at 12:02 AM on Jul. 14, 2008