"Uhhhh, I guess you could sit on my face?" You almost regret saying it, but the more you think about it, the less bad it seems. One, it's just a plush toy, what could it possibly do, and two, you personally wouldn't mind getting your face sat on by a life-size Gloria the Hippo, even if it is just a plush toy.
"Hihi, coming right up big boy," Gloria says before crawling up onto the bed with you, placing her hands on either side of your body. You look each other in the eyes for a moment before she leans back and sits by your feet. You notice that she doesn't make much of a dent in the bed, at least compared to you. Plush toy physics, you suppose.
She turns herself away from you and stands up, revealing her now massive ass. Just the sight of it is enough to reignite you lust, and your boner. It's soft, plush exterior only makes it look bigger, and you almost start to quiver from the excitement.
Just then, she jumps backward, rocketing her ass towards your face. You brace for impact, only for the impact to be like getting hit with a pillow in a pillow fight, a very soft, squishy, warm pillow. You were practically in heaven. You notice that Gloria's ass is much deeper than it looked, and you stare into its cavern before you feel more weight pushed onto you.
"Heh, you likin' this?" Gloria asks, semi-rhetorically. "Just say if you need anything, baby." You're already groping and squishing Gloria's massive ass, instinctively pushing your head forward to try to delve deeper into the depths.
"Heavier," you manage to say inbetween breathes. Almost instantly, her ass grows heavier on your face and you are pressed deeper into your bed, and deeper into her crack. The increase prompts a 'Oop!' from Gloria. Apparently she wasn't expecting that, or maybe she didn't know she could do that.
"Honey, I gotta say, you are pressing all my right buttons tonight," Gloria admits, although you aren't really paying attention.