They have an at home Roidtest kit and I recommend it for every pack a female takes from unless you are actually getting it through a prescription and pharmacy. I've seen once good companies fall as they start stretching for more profits.
An initial boost sometimes occurs more based on mood and intensity in gym, so I wouldn't worry about the big jump at the beginning to much. The human mind has an amazing amount of control over how much weight a person can lift on a given day. From my experience this is more pronounced in women. My wife can push 150 lb bench one week and then the next she struggles at 135, but I can tell her mind isn't 100% with her in the gym on those days.
You mention she is on a 1300 calorie diet, but then also mention she didn't eat anything the day before? Your diet has to be consistent if you want consistent results, especially while on gear.
Anavar generally causes my wife to gain a little water weight, while Primo seems to reduce it. Anavar seems to give better strength gains though than Primo does, so she has to ask what she is looking for in each cycle.