Brother and Sisterly Love: The Proposal (2011)

The pilot is about two teenagers, Katie & Johnny, who have been secretly in love since the 9th grade, but Katie has been lying to her strict mother for years that Johnny is just a friend. One day, insecure Johnny decides to propose to Katie with a promise ring, but things backfire on them when Johnny's biological father is in town and surprises them that Katie's mother and him are engaged. Just when they thought their relationship was going to another level, they both find out they are going to be brothers & sisters instead.