"Get off of me!" You angrily yell at your captor, held down under the weight of her foot.
"Come on, if you really wanted to get away from me so bad, I think you'd be able to get out from under there yourself," Ellie rubs her foot against you; you feel the moistness of her sole and the ridges of her skin graze your face. "I'm not even trying, are you? No, I think we both know you don't really want to go anywhere. This is exactly where you want to be, and it's exactly where you're going to remain for the foreseeable future; as long as I want."
The way Ellie's going on, you realise that she isn't just relaxing, casually pinning you down, she's actually touching herself. Her eyes are closed, her mouth hangs agape except for when she bites her lip every so often; her hand is dipped in her panties, fingers toying with her clit. She really is into you being beneath her like this, powerless compared to her.
"Are you-- are you getting off to this?" You eep out, still trying to push up against her sole. Ellie just presses it down on you, easily, undoing any progress you may have made on a whim. "You'd better get used to it," she says, "kiss it."
You respond, "You what?" "Kiss my foot," Ellie insists. "No!" you refuse. "Come on, you know you want to. Just think about it like this, the quicker you accept your place and play your part, the quicker this is over for you, hm? It's not like you're getting away anyway, is it?" Ellie laughs. "You're mine, whether you like it or not. Now kiss my foot."
Either way, you're playing into her pleasure. Kiss her foot and you're obeying her demands, you're buckling to her power over you, abiding by her wants and abandoning your own. Don't kiss her foot and you're just furthering that she's easily keeping you stuck here with just her foot against your will.