I'm asking this question about my sisters cat. I'm 17 and she's 14 and we have two sister cats from the same litter, they're both just over a year old. Her cat is black and we should have named her shadow as she barely interacts with any of us during the day. She's very shy and runs away if any of us try to stroke her or cuddle her. However, at night time she jumps onto my sisters bed and is very affectionate, giving kisses and headbumps - she's the same every night with her. But she only does this to my sister. When my sister and mum leave the house in the morning for school and work she cries constantly for her and when I try to pet her she runs away. But when my sister comes back in the afternoon 'shadow' continues her shy behaviour.
Why does she do this? We're all so confused!