Could be that she got a kick out of making others jealous?Possibly jealous or maybe she was the opposite and lacked empathy with the feelings of wives and partners. She seemed to lack sensitivity in this area of her life. She was known to turn up at the homes of her male chef friends, something which didn't always sit well with their wives. Her favourite programme was 'Mistresses' (according to her friend SC).
I get the impression she was very much a have your cake and eat it type of girl. Having relationships with men who already have a significant other gives one licence to have a relationship with more than one person.