The Importance of Being Earnest Act 3

All I have to say after finishing act 3 is wow. Really didn't see that twist coming. First, the act begins with Gwendolen and Cecily questioning whether they are going to forgive Jack and Algernon for lying about them being brothers and Ernest being Jack's name. Algernon and Jack then use the excuse that they did it in order for Jack to see Gwendolen and for Algernon to see Cecily as mouch as they can. So the two ladies buy the excuse and forgive them. But then Lady Bracknell refuses to give her blessing for Jack and Gwendolen's union. Right when Lady Bracknell and Gwendolen are about to leave, Miss Prism is questioned by Lady Bracknell about a lost baby from twenty eight years ago. We learn that this lost baby that was found at a rail station turned out to be Jack, which turns out to be Lady Bracknell's sister's son making Algernon and Jack brothers after all. Then we find out that Jack's name is in fact Ernest, named after his father, and they he's been telling the truth about his name and his relationship with Algernon for years! Crazy twist in the end but one other thing comes from it... Jack and Gwendolen are now first cousins that are engaged....