It isn't clear initially...

As the two women bump and grind against one another in a cruelly tight bear hug it isn't initially clear who has the advantage. It's clear from the pained look on their faces that they are both utterly determined to dominate the other. As their struggle continues the barbs and insults drop to a whisper and you and Michelle's boyfriend fall silent as you realise that nothing you do matters in this struggle.

Finally, with a moan of pain Michelle lowers her hands from Tina's back and starts to swing her breasts free of the crush to attack in a different way. Although the battle is not over, she's clearly come off the worse in this part of the struggle.

A brief flash of satisfaction flashes across Tina's face before the strain of the titfight imposes itself once more