J.C.
Well my daughter was a mere 15 months old when her baby sis came along. We let her pat my stomach all the time and she would say baby. But the real test is when the baby comes home. Of course Selena was jealous but we let her hold the baby( with supervison of course) and let her kiss the baby as long as she wasn't too rough. It was tough at first but she eventually got used to her baby sister and now they love each other to death. They fight so be prepared for that but I believe when you have them close together like that it is a good thing