she lets you hold her?

My not so friendly never lets you hold her let alone pick her up. As a matter of fact I am afraid to even try to pick her up. She is not mean about it but she usually scratches you. I think she just doesn't feel secure held in your arms like that or something. But the other morning Ella walked right up to her and picked her up and Sarah just sat there and let her do it. I was sooo surprised. I was even more shocked when she didn't try to get away and just sat there calmly. Today Ella tried to pick her up and Sarah bolted as soon as she figured out what she was doing.