You've been taken by surprise!

"You have taken me by surprise, cheee..cheater!", you slur, **** down your words. "What a pussy shirker!", she retorts, opening up her legs to let you go. "Ok, the hard way then!". You don't understand exactly what happened, but the simple idea of losing a physical confrontation to the girl that you are dating is unbearable. She has been lucky, that' s all. Scrambling back to your knees you get ready, immediately plunging again into her and forcibly sizing her waist. Grace was prepared for your attack though and, grappling fiercely, earns the space needed to fasten her legs around your middle section, preventing you to get on top. You are putting your entire weight on her upper body, resting your head on her breast, but she keeps your hands under control. She is quite strong despite the apparences, and even if your strenght is superior you cannot wield it freely to crash your opponent. The girl is sexually stimulated by the contact with your body. Yet, on your contrary, she's incredibly calm and determined. You feel that Grace is switching her weight from under you, but realize too late that she is putting your right arm into a joint lock. "This is called omoplata, loser", she says as you go face down on the bed with your right arm painfully twisted back. She sits on your shoulder, keeping your aching arm lifted. Realizing your predicament you tap out but to no avail.