Truvy: Sammy is so confused he doesn't know whether to scratch his watch or wind his butt.
Truvy: Louie brought his new girlfriend over, and the nicest thing I can say is all her tattoos are spelled correctly.
Ouiser: I've just been in a very bad mood for the past 40 years!
M'Lynn: Drum is not too bad, he tries to help out around the house.
Ouiser: Yeah, he probably takes the dishes out of the sink before he pees in it.
Annelle: Miss Truvy, I just want you to know my personal tragedy will not interfere with my ability to do good hair.
Answer: I believe it is because the child playing Jack Jr. was basically crying through this whole scene, as you can see. It's most likely his (actually her, as the real baby was a girl) real mother holding him to calm him down. Also, when the family is saying "Blow, blow," you can hear a female voice that is neither Julia Roberts or Sally Field.
When she is sitting with Jack Jr, it is before she goes to get her hair cut. When she tells M'Lynn she wants to cut her hair, she is wearing it in a banana clip and you can see the hair past her shoulders. When "she's" sitting with Jack Jr, there's no hair to be seen. Total stand in.
Daniel Camp is the actor who played Jack Jr.
Along with Daniel two other children played Jack Jr, C. Houser and Clara Gabrielle.