Friends fear NYC art-world heiress is isolated by daughter
Marie-Christophe de Menils East 81st Street home was, for years, a haven. The oil heiress andart patron used to host lively, inebriated parties that earned her the nickname Prosecco. After the overdose death of her adored grandson Dash Snow in 2009, de Menil opened her doors to the hell-raising artists friends. But more recently, the