Hmmmm...I'n not sure on how to get Nala over being fearful. From the video you have done well so far and BTW all three are soooooooooo adorable! .-Okay back on topic- Maybe when you get home in the morning instead of letting Nala out in the backyard to go potty. Take her around the corner. Or walk her a block or two. Use treats if you have to get her going. Seeing/Meeting even one or two people will help. Even if you just stand there hold a 2 minute conversation and have that person just talk to you without giving Nala eye contact until she feels more comfortable around people. I know your lifestyle is very busy and you don't have that much free time. Maybe even take Nala out on a leash when you do have free time with your son(of course her on one side and your son on the other). And as she being fearful around you during feeding time leash her to you and when she's done. let her be and you go on with what you have planned for the day. Even if it's for a minute or two it will help.