If it makes a pair in her hand she discards the pair. That player selects a card from your hand without seeing it, and adds it to her hand.
At your turn you must offer your cards spread face down to the player to your left. The players all look at their cards and discard any pairs they have (a pair is two cards of equal rank, such as two sevens or two kings). The dealer deals out all the cards to the players (generally some will have one more card than others - this does not matter). It is also possible to play with a special pack - see variations below.
From a standard 52 card pack remove one queen leaving 51 cards. This children's game is known by various names in many parts of the world, for example it is Schwarzer Peter (Black Peter) in Germany, Vieux Garçon or Le Pouilleux in France, Ekae in Thailand and Papaz kaçtı in Turkey.