In Pool - 2 players on the black and one player starts to deliberately miss - what happens?

In playing pool with a friend, we both eventually ended up on the black ball. She then chose to only 'touch' the cue tip onto the white ball and made no attempt to move the white ball in the direction of the black ball at the other end of the table. This is a deliberate attempt to miss and I say that this is cheating. What is the penalty for this?