I have no real idea janey, but I would like to think so...I know these two love each other very much and always groom each other,and have cuddled up in the past but usually sleep seperately, which is why I'm glad I got the pics. If they are outside and Minx can't see her brother she mews at me and walks outside as if to say "mum find him" he is never far away and she bounces over to him when we find him, so I'd like to think so,but i'm no expert which is why i'm here