ezio 's connection with pietro bembo did n't do any harm , either , and though lucrezia borgia 's former lover could n't attend , being away in urbino , the guests did include doge leonardo loredan and the up-and-coming young painter tizian vecelli , who , smitten by sofia 's beauty , and jealous of durer 's picture of her , offered , for a friendly price , to do a double portrait of them as a wedding tribute .