A lady as lovely as this deserves your full co-operation, at least until you can get into position to start gulping her down. So you take the offered potion and swallow it quickly. Not that you need to. For medicine, it tastes pretty good.

Sarah is not happy to hear of you drinking the potion. "Now you are drinking the potion? After you ate me? Twice? You could have finished me with such carelessness! You jerk! You..."

"Now dear, this is a school of vores. We expect a few accidents now and then. We just try to keep the number within reason. You'll just have to be happy this wasn't your time."

Not surprisingly Sarah is not persuaded by this appeal to look at the big picture. So a dozen other girls don't get digested? She's the one who almost did, and is mad about it. But at least she diverts her anger from you to the nurse, who eventually silences her with "Well, if you really don't like the situation, I can just give him a counter potion and he can dispose of you. Is that a better alternative?"

As Sarah sinks into silence, the nurse tells you "Now paperwork time. Just answer the questions..Your name is...?"

You answer the questions, while considering the nurse as your next meal. However, she stays alert and warns you "Naughty, naughty. Students are not supposed to eat the faculty without permission. And besides being against the rules, most of us are very experienced vores who can take out beginners like you in a swallow. If you try anything, you will be the one getting digested.
"Now if you want a little sex.., well, that's also against the rules, but I am a forgiving type, and if you come back when I have a little free time, you might find it worth your time...or might not."

You are about to suggest she seems to have some free time right now, but now another new student, a hot little redhead, appears, and the drill starts again.
As Candy drinks the potion and answers the questions, you are appreciating her finer points. Oh, they hardly qualify as the best you have seen around here, but they are darling, and deserve a place in your belly. A look at the nurse gets an unspoken answer to the unspoken question, that you are to wait until the paperwork is finished before you try to eat her.
That will take awhile, and you can likely find a meal elsewhere in the meantime. And since Candy seems a shy lass, she may notice you are waiting around and not give you an easy attack.
Still, you are still digesting Sarah, and don't really need to rush to get another meal. And Candy should be an easy and sure one.
Decisions, decisions...