As it's a game, and without spoiling any ideas I have, it will always be possible for Amelia to escape a situation. Player will need to figure out how to, but it wouldn't be very fair to just have an impossible situation thrown at them with no warning.
I am open to an idea like needing a Consensual Predator's help to escape an Apex Predator if I can find the right motives for it to make sense. I have not planned out Slime girl that far ahead to know if that's the direction I'll go yet.
Consensual Predators have a bias towards predators they have not fed recently, which means all Consensual Predators will visit all Apex Predators at some point. They first tend to find the Apex Predators closest to them, then are less likely to revisit unless all other Apex Predators have eaten them once. So it may take longer than a few days to achieve, but you could meet all Consensual Predators eventually if you have Amelia stay prey to one Apex Predator.