Samantha is claustrophobic (a stomach and the trip to it would terrify her out of her mind), and one of my favorite characters, so she's pretty much a predator (when she's involved in vore at all). If you wanted her to be prey...(*Sticks tongue out and wags fingers with thumbs plugged in ears).
She is physically very weak, so she has a hard time lifting her own backpack, let alone a creature her size or larger (She's only 5'4"), so she usually relies on her spells "Reduce" and "Enlarge" to get the upper hand on her assailants.
However, she has the ability to cast "Hold Person," which effectively paralyzes the target in whatever position it was in when afflicted. This removes the obstacle of struggle from the situation.
Your choice.