"Oop! Too late," Jen noticed, "Looks like you have to take both. Sorry!"
"Oooohhh..." Susan moaned defeated, "Okay, have your way with me."
Jennifer, of course, was helpless to obey the command. She grinned impishly as she looked Susan up and down, thinking of what to do with her.
"Okay Susan, as you wish!" Jen said, tenting her fingers, "Okay, for your transformation... you'll be a naked semi-divine being just like me, except much fatter with a huge butt and thighs and a pot belly and perky little boobs. You'll have the same powers as me, and be subject to the same curse as me, meaning anything command you're given you will obey, and anything you hear someone say about you comes true. Only you and me are aware of the reality changes our curse causes. For your dare, you will say that my boobs are as big as my head and marvel at how their weight doesn't trouble me! Aaaand, ACTION!"
Jen watched as Susan's clothes vanished completely, leaving her rapidly fattening body and perfect glowing skin exposed. She'd easily put on another hundred pounds of fat in her belly, waist, hips, butt, and thighs. Her breasts dropped two cup sizes, becoming small, perky mounds. She looked up at Jennifer, starry eyed.
"Oh wow, Jenny!" Susan marveled, "Your boobs are so huge! They look as big as your head! It's amazing how their weight doesn't hurt your back or anything! And they're so jiggly and soft too. Your boobs are the best in the school!" Both Jenny and Susan felt the telltale tingle of the world around them changing as Jenny's boobs inflated to the size of her head. Jenny bounced them a bit, enjoying their gelatinous jiggling and plush heft. She then looked at Susan's chubby butt and grinned.
"Well, your fat butt is so pretty," Jen told her friend, "I'm so glad that you like when people grope and fondle your plump, plush body, because that means I get to enjoy playing with your bubble booty!" She then reached behind Susan and began massaging her fat behind.
"Oh yeah?" Susan said, admittedly enjoying having her fat butt fondled, "Well I'm so glad you like when people play with your huge boobs, seeing as they're so soft and pleasant feeling." She then started massaging her face with Jennifer's boobs. They were both aware of what the other was doing, but neither cared since, as they told each other, they liked it.
When the bus arrived at school, they temporarily parted ways, agreeing to see how far their day takes them with their new bodies and powers.