I'm not sure what they would be upset about, other than what she's wearing (not a huge pok-a-dot fan here), the portraits turned out nice... I don't think their issue would be any fault of yours (especially if - like you said - counselled them before hand as to waht to wear etc). Like the others said, I'd find out exactly what's being said and if they are truely unhappy I'd offer ONE re-shoot in what you've advised her to wear (to flatter her form) and leave it at that... Again, like others said, not everyone can be made happy unfortunately, but I wish you the best! (BTW I like the waterfall one's a lot).
Definately keep us posted, please. I am curiouse as to how this pans out.
