Hi. I just had a baby 10 months ago and I've been back to my pre-pregnancy weight & clothes since around May.
1st- she needs to take a look at her whole program. Not being able to drink shakes is irrelevant. What is her diet like? Does she know exactly what she is comsuming? Calories, fat, carbs, protein....
2nd- my time is very limited as well with the new baby. I also only train 3x per week, I do cardio 4-5 times per week. I started low then progressivly worked my way up to about 40min. Heaps of cardio is not the answer. If you start with 45 of cardio, see results then stall...what are you going to do? 2hrs of cardio? That's just not necessary.
Same with diet, if you immeditaly cut your calories too much, what are you going to do?
Get some more info on what she's doing. That is the best way to help. And congrats on the new baby!!