Blaze has definitely gotten really hot by watching you eat Lilian, and she wants to get really close to you as well. A fine idea in your view, but Lilian of course is a bit of a problem as she has expanded your belly quite a bit. However Blaze is willing to stand a bit awkwardly to increase the physical contact.

Which means that with Lizzy on hands and knees behind her and you giving her a push from the front, she flips back before she has the slightest idea anything is wrong. Like a teetertotter, as her head goes down, her feet come up, ending up right in your face, where it is almost hard to avoid putting them in your mouth. Very lovely and very delicious feet too. Blaze is going to be a delight to eat.

Blaze's first reaction is to try to spread her feet. Does she have the idea that you were going to take her here and now? Certainly a grand idea, but there are drawback, Lizzy likely being among them. In any case, she soon realizes your real intentions. "Hey, that's not fair."

Fair maybe not, but eating her feet first has definite advantages. With her legs yanked up into your mouth, Blaze is pretty helpless to do much of anything until you have eaten about half of her. And Lizzy is moving around to make sure Blaze's hands are secure, so she is practically doomed before her ankles pass your jaw.
She of course continues to try, but her calves and thighs move down your throat at a steady pace. But you pause at her forest and apply tongue and hand. Both are welcomed and Blaze begins to buck for a quite different reason.
Once she has relaxed, you gesture Lizzy to put both of Blaze's hands on her cunt, and then you swallow hands and hips. Before you reach her belly button, Blaze has realized she is food, and starts working on another orgasm instead of escape. You help her out by caressing her darlings and by the time your lips reach them, she is bucking inside you again.
As you slip her trophies in your mouth, Blaze bends her neck so she can whisper to you "Eating me still wasn't nice at all, but I have to admit it was very enjoyable. So maybe I'll forgive you."
But now you engulf her shoulders and her neck and head follow quickly. For a moment, all that is left of her is her long flowing hair, which now looks like a big beard on you. But a couple of swallows and that too is inside you and Blaze is quickly entangled in your stomach with Lilian. The two of them quickly start an argument over whose fault it is that both of them are meat. [Your suggestion they have sex or one eat the other is coldly rejected. They want no more to do with each other than they have to.]

In the meantime you are are experiencing the standard situation of a vore. Your stomach is vigorously telling you you have had enough, and a good deal more than enough. But they tasted so good... Girls are downright addictive. More is always better. The prime reason for not eating more is often that your belly is too big to let you reach any more.
In your case, Lizzy is within reach, and definitely would be a nice dessert. But she would likely object, and it's going to be hard enough to waddle back to Lizzy's room with 2 lasses in your belly, much less 3.
But she is available...