Personally I felt desperately sorry for poor Anna during those scenes between her and the sadistic Phelan and I think Debbie Rush portrayed the part of a broken and humiliated woman in horrible physical pain to perfection, kudos to her.
Tbh, fiction or not, I think his sadistic mental torture (with the added implied threat of further sexual abuse on her) was rather gratuitously offensive and not really necessary since it appears he's not going anywhere for a good while yet and we already knew what a nasty b*stard he is.