Our female cat Chip adores my oldest son. She went through a brief depression when he got engaged and moved out to his own place. Before he moved out his fiance would stay over at our house once in a while. Since they were getting married she would stay in his room and the cat did not like it. She threw up on her twice in the middle of the night and would bite her toes when she was sleeping. She never did this to any of us or to his other friends that slept over while he was growing up. Are your cats Jealous of other people who are close to you ? Beth