Sentence:  The monk Savonarola , brought over from the Renaissance and placed against the background of Munich at the turn of the century , protests against the luxurious works displayed in the art shop of M. Bluthenzweig ; in particular against a Madonna portrayed in a voluptuous style and modeled , according to gossip , upon the painter 's <WSD>mistress</WSD> . 
Meaning of the word marked with <WSD> tags:  an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man