Hippolyta and Lysander stand together in love but her father disagrees with this and wants Demetrius to marry instead of Lysander. The father having the choice of who his daughter marries was normal in this time.
Bottom's head gets turned into a horse head. This is caused by puck fooling around and turning his head into an ass when bottom was in the forest waiting for the call from his friends for his part in the play
Titania and Obereon are fighting and having lots of arguments. This is mainly because of a child that Titania has. Obereon wants this child but she won't hand him over which is causing the conflict