Constant sweating is generally not a symptom of yin deficiency - but of qi or yang deficiency. The paleness on the tongue and weak pulse would confirm this as well. Her symptoms may get worse after treatment because yin points are mildly building and many disperse heat - if a patient is deficient they will get worse with those points.
I would recommend treating for qi and/or yang deficiency and seeing what the results are. Moxibustion on appropriate points may help to contain the fluids.
You may want to read the ten questions section on sweating and it's meaning. You could also consider the LI 4, KD 7 combination mentioned on the LI 4 page - "Strengthens the wei qi, improves immunity
Regulates the sweat glands, for excessive sweating tonify LI 4 then disperse KD 7."
Also take a look at the general indications for Qi Deficiency and Yang Deficiency and see what matches best with her symptoms.