remember not to focus all your attention on the scale. She's only been going at it 4 weeks and her clothes are already fitting a bit looser, that is great! I would guess that she is probably putting on a bit of muscle while burning fat, the first 1-2 months are the time when the most muscle will be gained which will offset the weight of lost fat a bit. An increase in muscle will help give her the shape that most/all women want. I personally would add a fibrous carb to the cottage chees before bed. Broccolli or spinach would be perfect!
Again, let the mirror and the fit of clothes do the talking as much or more than the scale. Tell her to keep it up and that from that list of improvements above it sounds like she's doing very well.