I sort of wonder if Barb threw more tantrums than Chris. We know she has a very unhealthy persecution complex, as well, so I have no difficulty seeing her use Chris as a catalyst to feed it.
"You can't tell mah little snowflake he can't play da poke mans, HE HAS DA AUTISM!! You're-a prejudicing us!! Imma press charges!! Imma press charges!! BARBECUE SPARE RIIIIIBS - SQUEEEEEE!!!!"
**shits pants**
C'mon, I defy someone to tell me they can't envision this exact scene playing out at Books-a-Million.
As well, I can see her intentionally dressing Chris as retardedly as possible, to gain sympathy for having to raise a "slow in da mind." Granted, she's not exactly a fashion bug herself, but - c'mon - no human on the planet sees Chris' outfit, and doesn't immediately think "retard." Barb is so many degrees of fucked up, why not toss in factitious disorder by proxy as well?