You're knuckles are white as the sensations wash over you, her hand filling your sex, pushing back right to the deepest parts. My god she is still shoving.
"Oh god!" you mutter, then your eyes go wide once more as you feel something relax inside you and her arm starts to slide in through your sex lips.
"Hmm, good response from the cervix. Womb feels good." nurse says.
"I... din't know that was. OH! possible!" you gasp as her elbow pops into your sex, her hand now bulging out your belly.
"Hmm? Oh certainly, you seem a little more open to this than most actually. You should do very well in those classes."
With a bump you again feel her shoulder hit your rear. She has her whole arm inside you!
For a few moments she wriggles around and then pulls free, your sex sucks hard, seemingly not wanting to give up it's meal, but after a little tugging the nurse comes free and washes her hands again.