Mark refuses to speak to Maggie or Ken. Maggie is furious with Tracy. Vicky celebrates her sixteenth birthday. Tracy avoids Ken. Steve takes Vicky with him when he does a job for Mike in the Jaguar. Vicky tells Steve that Alec has got a girlfriend and doesn't know if she should keep the news from Bet. Maggie accuses Tracy of hurting Mark. Tracy maintains that he had a right to know the truth. In her anger, Maggie tells Tracy that Deirdre once had an affair with Mike and that is why Ken hates him. Tracy is shattered. The Hortons are upset when Lisa and Tom leave. Des drives them to Weatherfield. Deirdre is devastated when Tracy tackles her about her affair with Mike. Tracy accuses her of hypocrisy over Ken's affair with Wendy Crozier. Tracy tells her that she hates her and now knows her for what she is. Bet tells Vicky how she was pregnant at sixteen and warns her not to park her brains under the bed. Deirdre tells Ken that his girlfriend has ruined her life and she wishes she'd never h