What are Oberon and Titania feuding over in William Shakespeare's play "A Midsummer Night's Dream"?

In William Shakespeare's play "A Midsummer Night Dream", Oberon and Titania are feuding over a little boy. It is early on in the play in Act II that we learn that Titania has been taking care of a "lovely" Indian boy. She is spending all her time lavishing him with love and affection (Act 2, Scene 1).

Oberon and Titania, king and queen of a kingdom of fairies, both want a young Indian boy to be part of their entourage. Titania wants the child, who is half mortal, half fairy, because she promised his dead mother (her friend) that she would raise and care for the boy. King Oberon wants the child so that Titania won't lavish to much of her own personal attention on the boy.

Oberon wishes to make the boy his knight. Titania, however, refuses to give the boy up. When one is at the theater seeing this comedy "A Midsummer Night Dream", critics have pointed out that the conflict between Oberon and Titania imports into the fairy realm the motif of love being out of balance. This is an idea that is made key to enjoying the entire play.