I agree it might be better with some adjustment to the contrast, I don't think that plaid against the grayish beige background was ideal, and those may not have been your choices so talking about specifics ahead of time could help.
I think sometimes people seem to be asking around to get anyone (or maybe everyone!) they know with a camera who will do it for free - to do it for free. And then ask more than one person and then maybe do their own editing and then start posting on Facebook... (And the daughter is modeling, sounds like she wanted portraits for free instead of going to a professional portrait photographer where she'd have to pay.)
She could have handled this better and just asked one person to take pictures but I think when it's free people may not look at it as work and might take it for granted that it's OK to not use the photos that they didn't pay for. Or if it was being submitted and you don't know the guidelines yourself you don't know necessarily what they're looking for or what might have a better chance of being accepted. Probably better to ask questions about usage and get clear on expectations to minimize problems later.
Now you know, to politely decline! and if the daughter is modeling the mom should probably start looking into hiring a photographer for portraits.