I do not own Teenwolf and some of the things used were in episodes

Lydia has no idea how connected her and Peter actually are. Lydia has always been the smart girl who had everything together but her world came crashing down on her the night of the attack. When Lydia was found she was stripped of her social status and thought of as having a mental illness; like her grandmother supposedly had. Peter had no intentions of making Lydia appear crazy but needed her help he is after all a bad guy.
After Peter was brought back to life Lydia was relieved he would no longer be messing with her head and emotions. Peter on the other hand wanted to mess with Lydia's emotions in a not so evil way this time he wanted her all for himself. When Peter leaves Lydia's mom in school Lydia is upset he didn't approach her instead of her mother.
Later that day Lydia drives to the loft Peter and Derek are sharing she was going to give him a piece of her mind. When Lydia enters she is not at all surprised to see Peter staring at her. Lydia walks up to the man who is a lot taller and stronger than her with full intentions to start yelling but realizes it is insane to try to make a point but before she can leave or say something he speaks. "Hello Lydia I've been waiting for some time I didn't think you would show." This statement enraged her further she stood tall and said "Why were you school today talking to my mother! What you need someone else to bring you back from the dead or to make crazy." Peter thought about what she said then replied." My intentions were to never make you feel crazy." "Well it made me feel really crazy and everyone thought I was my parents almost put me in an asylum." Peter stared at her for a few minutes and when she went to turn he grabbed her wrist and said "Lydia the reason I went to the school today was to get your attention. I want to talk to you about us." "What 'us' there is no 'us'?" When Lydia finished talking Peter grabbed her around the waist and kissed her with all the passion he had. At first Lydia tried to pull away then she realized this is what she wanted.