NEW YORK (Reuters)- Picasso's 1941 portrait of his mistress, "Dora Maar with cat," sold for an astounding $95 million at Sotheby's on Wednesday, becoming the second most expensive painting in auction history. The vibrant, large-scale work depicts Maar, the surrealist photographer Picasso was romantically involved with for a decade, seated in a chair with a small cat perched on the back. It had been expected to sell for upwards of $40 million, but the winning bid of $95,216,000, including commission, caught even Sotheby's officials by surprise. "I was hoping for 70-plus," said David Norman, Sotheby's co-chair of Impressionist and modern...