Solicitor general Lesley Thomson asked Mrs Spence to describe her daughter and their relationship.
"She was very happy, very positive," she said. "I never had any problems with her. She was a very loving, caring girl. We were very close. She was like my friend, my best friend. She took me out every Saturday.
"I heard from her every day. I was very over-protective, a bit of a nutcase mother. As long as I knew and got a phone call or a text message to say she was in. I used to drive her mad because she was like, 'what age am I?'."
Mrs Spence wept as she added: "But she was my life. I've only got one lassie. I just keep thinking she's going to come back."