Not sure if this is mentioned yet, if at this point padi is aware of this type of instruction, either your aow, or your freinds ow will not be legit, or both so in all you now will loose your cert and money.
The other is how much did you two have to drink, and sleep, or even just her. just like they say do not drink the water, how much actual water were you drinking. was there any elevation you went to during your stay.
I get all the of dive profile, just wonder of other related things that can induce it.
And I can clearly say I have been in some sort of bent way, the pain was not enough for me to hit the chamber. I would go for a dive and a long shallow safety and then slowly come up to surface.
So if she is not going to chamber, just take her for a dive, and see how she feels in the next few days. And here in the good ole USA there is no law that says you can not go scubadiving without being certified, or how deep you can go.
Any ways when I do multiple dives in tropic water I will do a shallow shore dive in the middle of the dives, usually after the dive day is over.
Happy Diving