Fight back

You squirm your legs out of his hold, pushing him away with all the energy that you have left. Your only luck is that he's much lighter than you, so you can break the grapevine on your tights and finally kick him back using your feet. You rise up in a kneeling position, but in no time he is on you again. You try to defend yourself catching his hands, however there is not much strength left in your arms. "Listen big sis..", he whispers, "You are gonna lose and we both know it. Spare yourself this humiliation and say that you have enough. We can stop it right now..just admit defeat..". Your breath is labored and you are wondering how longer you can resist.