You don't stop yourself just in time
From Create Your Own Story
But by the time she finishes her scentence it's already too late. Your cock hit her delicate membrane too forcefully and shreds her maidenhood before you could even try to react (one of the drawbacks of being built like a battering ram -- it's a little too easy to knock down doors!!) Your grip slips in suprise at what you've just discovered and heard and she slides sharply down your body. You regain your grip by grabbing her around the lower back, but not before impaling her on a full additional foot of cock, obliterating her hymen and any memory of it in one swift move. She shreaks in pain and shock at being so completely and suddenly invaded.
Time seems to stop. She's clinging to you tightly, shivering and gasping in pain from having your 14 inch cock burried balls deep in her pussy in the blink of an eye. You are afraid to even breath, let along move. You feel something running down your leg, and smell the faint scent of blood. Your heart skips a beat when you hear her let out a little sob.
"It hurts." she manages to whisper as the pain subsides, gripping you as tight as she can.
You hug her to you more tightly and remain silent until she recovers.