Complex sentence: Reece had previously made a cameo appearance as herself on the HBO series "Arliss" in which, ironically, she angrily reprimanded her agent for even suggesting she accept an offer to pose nude for Playboy.
Split into simpler sentences: Reece had previously made a cameo appearance as herself on the HBO series "Arliss". In it she angrily reprimanded her agent for even suggesting she accept an offer to pose nude for Playboy.