the danger with "speed" pills is that it is very common for local manufacturers to put other substances in the pill as well as the speed. the most common adulterant is ketamine. probably about 50% of "speed" pills that we test also test positive for ketamine. i think you'd much rather her first experience of a pill was not one that would put her into a k-hole. and sometimes things fat trippier than k have been known to end up in "speed" pills.
remember that powdered speed can also be taken orally, either in a capsule, or dissolved in a drink.
taking it this way would be preferable to taking the gamble as to what is in a pill. you also have a much better control over the dosage.
another idea might for you to road test the pills first, maybe the weekend before. that way you will have a good indication of what she would be in for, and you can prepare her for it (this is assuming that you have taken pills before, and i canonly assume from your post that you have).