This deal on Geraldo from the housekeepers in Marathon, Florida at the Shelley's home...makes it seem that even when Anna is away from HKS she was taking drugs on her own. Not so sure that helps our case against Howard.
But didn't Gina and Laurie both say that when Howard came on the scene, ANS turned into a different person, no more "life of the party"?
He is so frigging serious all the time, he would be a buzz-kill - so she probably "needed" to use more when he was around, just because of the intensity oozing out of his pores and sweat glands around her.
Doesn't matter. Yes, she probably took them willingly in MOST cases but she's depending on a doctor WHO IS RIGHT THERE observing her.