On the other hand, she seems a lot less honest than Hef. When de Beauvoir finally had enough of Kosakiewicz, she introduced her to Sartre, who fell head over heels and tried to seduce Kosakiewicz for two whole years. But Olga wasn't into it, so she took a pass and found that there was in fact an exit. Right when Sartre had finally given up, however, Olga's younger and more receptive sister came to Paris. This seems like a fairly complicated configuration already, but then de Beauvior became bored with it all and decided to seduce Olga's new boyfriend, who later became Olga's husband, even though he continued his affair with de Beauvoir well into their marriage.
De Beauvoir mined the whole thing for material for her 1943 novel She Came To Stay, in which she combined Olga and her sister into one character who has lots of threesomes with a philosopher couple and then gets murdered. The book was dedicated to Olga, who presumably began sleeping with a mess of weapons under her pillow.