Yes, and she will make you pay...

"Take this!"
She grabs the back of your neck, and pulls you to her hard. The other hand grabs your hole below her belly, and pulls it out.
"Ow!" you yelp. "That hurts!"
"I warned you. My place...you get what you deserve!"
Amy pulls you down with determination. With her hand prestretching you, you sink lower over Amy's body. Painfully. You can't do anything, you are frozen in shock and pain as you watch your belly grow absurdly large as Amy forces herself into you. She soon is over the hump and you slide down to her breasts. With nothing but a gentle nudge, those enter you, too. She even puts her arms into you, and you sink to her neck.
"Whoa! Slow down!"
You let go of the headboard and fall heavily on the bed on your back.
"It hurts!"
"I can see you are bleeding in several places. Talk about gaping too. Your cheeks have like not closed over your hole either."
"I need to learn to stop teasing you. You can't take a joke," you tell her angrily.
"Oh come on! You needed to get this big."
"Bigger, just not all at once!"
"I am sorry...about the bleeding. You took so much, I thought it wouldn't happen."
"Look how big I am! My poor figure!"
"I can't see, but I'm sure you are sexier than ever!"
"I'm jutting out so far and wide. My poor asshole!"
"Oh, get over it. I said I'm sorry. Go get our dolls, they might cure that hurting."
"Yes, right," you say through gritted teeth. You try to pull yourself upright, but the weight in your front is too heavy. "Fucking tits. Fucking pregnancy."
You try and roll over. You manage to get on your side. Your middle sticks out like five feet and also a couple feet to either side. It's not lumpy, but still a normal pregnant shape. Must be the magic. You pull yourself to the edge of the bed and get your feet on the floor. You hold the bedpost and, expecting how heavy you are in front, lean back and stand, successfully. You stand bow-legged for Amy's benefit.
"You don't feel bad inside me. I'm happy to have so much in me, to be able to hold so much," you tell her as you walk slowly and carefully.
"I can motorboat your butt, if you like. You are gaping so wide I can stick my legs up here any time."
"Behave, almost there."
You grab the dolls and sit on the couch, leaned back, legs spread. You place Blue in your palm, held out, and wish them alive while raising Red up.
"I wish these fucking shemale demonesses would come to life!"
Blue appears in front of you to your right, her dick in your hand. Red appears straddling your belly, her dick in your open mouth. You suck greedily.
"Master! Look at you! Master! Oh, Master! Suck it, you big fat preggo! Mmmm..."
You moan into her cock. She just looks almost bug-eyed in surprise. That doesn't stop her from cumming in your mouth. You pull her cock out and let it shoot all over your face and chest, a big grin on your face as you swallow what you caught in your mouth.
"Master...Amy...what have you done..."
"Amy thought I could handle it. She tore me wide open," you relate.
"Mistress." Blue says, moving between your legs to address her directly, "You messed up. Your demons are going to cross-breed."
"You both have small demons in your bellies now, large fetuses. The cum from them is still determining their forms. You just mixed them," Red finishes.
"So?" Amy says.
"So now they will be harder to control. You turned this from a kinky romp into a serious health risk, Mistress!"
"See! Told you not to," you yell.
"I said I'm sorry!"
"Normally, a demon can knock up another, and that demon is, for example, red or blue. What you did here is akin to making a purple demon. Who knows what rules it would follow? That's what makes the binding rituals dangerous. We don't know what rules it follows. It might work fine, or it might enslave you to her!"
"No sense worrying about it now. Let's get Amy out of there so I can help you, Master."
Blue reaches into you, and pulls Amy out by the shoulders. Amy sits beside you (strangely clean if not wet) and Red moves between your legs to examine you. "This isn't so bad," Red tells you as she licks up blood. "A load of cum will seal the wounds." She hops up on the couch beside you, cock at the ready. "Your butt is too big," she tells you.
"Tits? Mouth? Something else?"