Nivea is not dangerous or anything, especially if it is clean (squirted out of a bottle versus dipped out of a tub). But it does not seem very clinical. Why does the osteopath put his fingers in her vagina, is it a once-a-year or once every three years thing like a pelvic exam? I have only once or twice had a doctor put actual fingers in my vagina, the older-fashioned kind of pelvic exams used to involve a little of that for the reason of feeling the ovaries by pushing on the same time at the outside of the abdomen. Is that what the doctor is doing?
Why would someone use a face and hand cream, which is intended for external use, to do a pelvic examination? It might not hurt her, but it is definitely not a product designed for that use. There are purpose-designed products, like KY Jelly, that are intended to be used as lubrication when inserting anything into a woman's vagina.