What kind of perm did she use? I know with affirm lye mild(and design essentials relaxers) the relaxer is washed out, then a conditioner is put on for 10 minutes (this conditioner is very low ph and begins to immediately neutraliz the chemical as well as replenish moisture and protein while hair is still very fragile and weak). IMO, that is why affirm and design essentials are superior relaxers. I call this a "neutralizing conditioner". After the conditioner is rinsed out, THEN the neutralizing shampoo is used. However, the shampoo doesn't have to work that hard because a lot of the relaxer already neutralized by the condtioner and less washing/manipulation of the hair is need to rinse the relaxer completely out. After the neutralizing shampoo, the same conditioner is put on again another 10 minutes, no heat, and that's rinsed out. Then the leave-in and rollerset.
A lot of the newer relaxer systems are incorporating this "neutralizing conditioner" because it conditions as well as immediately begins to neutralize the relaxer. I'm not sure about the setting under the dryer though, I've never sat under the dryer until AFTER my rollerset . . . so not sure about that one. . .