Has she had any signs of carb flu? If not, then she's probably still in her sugar-burning stage ==> no fat loss yet.
Not everyone gets carb flu, but it's a tangible sign to look for.
The first month of primal is usually chock full of snackies like nuts and yogurt, to make up for the loss of an entire food group. With a little will power and a little more fat at mealtimes, that gradually slacks off.
"I'm talking her to sleep at night." <-- anyone want to take the bait on this one?
5'0" female, 44 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 115(!) on SAD chocolate, potato chips, and stress. Currently keeping food tracker.
I (try to) follow by-the-book primal as advocated by Mark Sisson, except for whey powder and a bit of cream. I advocate a two-month strict adjustment for newbies. But everybody is different and should tweak Primal to their own needs.