His mother , Liz , had a brief relationship with Bryce Redstaff that resulted in pregnancy , but she married Harry Ryan and allowed him to believe that the baby was his .
In season 3 , Alex discovers that Harry Ryan is not his biological father .
Alex 's mother , Liz , had a brief relationship with Bryce Redstaff that resulted in pregnancy , but she Harry Ryan   Ryan and allowed him to believe that the baby was his .
In season 3 , Alex discovers that Harry Ryan is not his biological father .