Cos I know how this mother must feel(provided she's innocent)
Being a person who is known to watch my diet and eat less many times, foolish individuals from my family and outside of it tend to ask me horribly insensitive questions like do I feed my daughter less than I should, simply because she is naturally skinny. This is very exasperating cos I know as a mom I always make sure my child eats well. Besides just cos she's not all chubby and round doesn't mean she's underfed!
In this mom's case it's similar accusations based on suspicions that have actually become public and ruining her life and reputation! Surely the kid may have very well got sunburned playing, and normally folks would not have bothered, but just cos her mom uses a tanning booth and looks the way she does, they accuse her! Grrrrr