Sionn flinches each time the tip nudges against her, still frantically wondering how this monster will be able to take her. It's only a matter of time though before he finally gets into the exact position needed, and with a squeak she feels him start to part her sex. She starts to struggle a little, more an instinctual response then anything but he's quite capable of holding her still as he starts to push inside of her. Considering that none of her 'births' have involved a normal sized baby this is probably thing largest thing to spread her open, and she can feel every inch of it. "Oh gods...this'll tear me apart!" she squeals.