You vaguely realize the nurse is really hot and you would love to jump her, but the change to your body pushes this to the back of your mind. Instead you scream [in a horribly feminine voice] "I'm a boy! I can't be changed like this! I'm not a girl!"
"You are indeed female, and a quite attractive one, I must say." the nurse disagrees with you. "What in the world makes you think you are not?"
"I'm male!" you insist, "I've been male all my life. I was male when I enrolled here. I was male when I joined ABA. I was male when Sarah ate me..."
"Ah, that may explain it." the nurse looks like she has solved a puzzle. "Now just hold still..." and her hand dives to a very sensitive part of your body.
"Hey!"
"Just hold still like I said." orders the nurse. Her caressing of your newly acquired womanly parts makes that nearly impossible, but you are starting to realize you don't want to resist her efforts. In fact you are enjoying them tremendously. You continue to wiggle and squirm, but not to push her away.
Then comes a wonderful feeling, and you lie back in a state of bliss. It is only slowly that the nurse's words start to penetrate.
"Yes, you were a boy. But you are now a girl, in all respects, and likely to stay one. There are ways to restore your former sex, but you will have to find them on your own. We have enough to do to teach you and keep you from permanently digesting each other too often. So you had better get used to being a girl."
"But I'm a boy." you continue to protest. "I'm even hot for you, and think boys are not sexy."
"You haven't seen a boy since you got changed." the nurse points out. "The odds are pretty good you will find them a lot more attractive when you do. But we have a lot of lesbians on campus, so your claim, even if true, doesn't mean you are not a girl now."
"But..." you try to find a way to deny the obvious, but that is becoming all too difficult.
"Now I had best give you some instructions on your new body." the nurse announces. "For example, those lovely mounds of yours..." Her hands cup them, caressing in a very enjoyable manner as she blathers about unimportant things. You concentrate on your increasing excitement as your breasts swell with emotion and your nipples stiffen as she pinches them.
The subject of the lecture moves on to other parts of your body, tender, delicate parts that respond eagerly to her stimulating touch. You can feel your excitement building until you can't hold it in anymore, and a tidal wave of passion overwhelms you.
You wake to see the nurse standing over you, and from far away you hear her saying... "I stimulated her too much. Now if I let her leave, she'll be gobbled up before she can take a step. I suppose I could eat her myself, but..." You don't hear what the drawbacks are, and don't care. You just want to make the wonderful nurse happy any way you can.