Speaking to This Morning ahead of her farewell episode on Wednesday, the mum-of-one explained why, for her, it was the right time to go.She said: "My contract was for three years and I knew I would probably only stay for the three years because I knew by that time my daughter would be doing her A-Levels and I just felt I needed to be around a bit more."She is going to uni next year and I feel that I've done my stint and I can always go back, if they will ever have me back, they have left it open."But I need to be back in London really, I need to be around for her."Also I want to work but I want to do something, I suppose, a bit more creative, not knocking Corrie but it is a little bit of a conveyor belt type of job, so I just wanted a bit of a change."I was landlady of the Rovers for two years and then they sort of moved us out and I was in the Bistro and it was great but it actually wasn't enough, in a way, for me."She may have finished her time in Weatherfield, but it is still a busy life for Michelle as she is set to appear in hospital drama Casualty, as well as embarking on stage in London and promoting her autobiography 'This Is Me'.Excerpts of the book have been released to the media ahead of its release, which included the actress admitting she once tried to take her own life. "The reason why I wanted to do this book was because I wanted it to be honest and it had to have its ups and downs," she said."There is a real stigma about depression and about women having to succeed and I was going through a really hard time and I was trying to be superwoman... and I was under a huge amount of pressure and I think I was frightened to tell anybody how I was feeling and I didn't want to let people down."Michelle's exit from Coronation Street is broadcast on UTV on Wednesday at 7.30pm.