In a portable playpen

Elizabeth opened her eyes and sat up. She was in a portable playpen set up in the living room of her sister-mommy's house, still dressed in her pink and white oversexed schoolgirl clothes, minus the high heeled mary-janes which she didn't see anywhere. She rubbed the sleep out of her eyes, she hadn't taken a nap that refreshing for as long as she could remember.

"Wow, like, what time is it?" She said out loud.

Her sister-mommy appeared from the kitchen, a big smile on her face. "There's my little girl, all fresh from her nap! Does my little Lizzie feel better now? Does your head still hurt?"

Elizabeth felt a smile grow on her face, "No, I'm like, all better now. What happened? Why am I like, in a playpen thingy?"

"I wanted to keep an eye on you while you were napping, you scared me with how bad you were hurting. But don't worry, Mommy figured out how to make you all better."

Elizabeth stood up and climbed out of the playpen. She tried to remember what she'd been thinking of before, what she'd been grasping at. "Uh, where are my shoes? I really think I like, need to go home and like, see a doc about my head thingy."

Megan tut-tutted at her. "Now now, you aren't ready to drive in your condition. And I called Jeff, he is on a boys weekend with his friends, so there is no reason for you to go back and sit alone in a house. We have the room for you here, I think you can stay for a little while until I'm sure you're all better."

Elizabeth wasn't sure she should argue. Her sister, or mommy, or whatever she was, seemed to have arranged everything, and in any case she couldn't remember clearly why she needed to leave so badly.

Megan turned on the television to a kids cartoon and left Elizabeth to watch it on the couch while she did some work. Her breasts tingled and itched a bit, and she found herself distracted. A tingling down between her legs accompanied it as well, and she was unsure what might have caused it.

That evening, Elizabeth was getting ready for bed in her 'jammies' that Megan had laid out for her, a pink zip up footie onesie with all sorts of girly clip art on it. She hadn't recalled seeing it before, but Megan told her it was a 'special present' she'd gotten a while ago.

Elizabeth had felt the pressure in her head getting slightly bigger all day, but she'd been focused on pushing back, trying to remember what she was sure was something desperately wrong about her. As late as it was in the evening, the pain had gotten unbearable. She held back tears as her sister-mommy loosened her pig tails and let her hair loose for the night.

Megan noticed her sniffling. "Lizzie, is something the matter? Are you crying? You can tell mommy."

Elizabeth felt like she was searching for a string in a maze of strings in her mind. If she could just find the right thread, she'd remember why she was so scared, and she could get away. Her mommy, no, her sister, SISTER! grabbed her and cradled her in her arms. At the word 'sister', she felt a stab of pain in her head. That was it! This wasn't her mommy, it was her sister!

The pressure ignited even more, this was the wrong thing, the problem with her world. She tried to focus on it, but the pressure in her head spiked so hard she let out a sob. She closed her eyes and cried. Megan cooed and rocked her, but it didn't help.

Elizabeth felt the nipple at her lips before she knew what was happening. 'No! This is wrong!' she thought, but a **** part of her knew that this had made the pain go away before, maybe it would make it stop again. She could think clearly then, and get away, get to safety.

She suckled.

At once the pain abated, and a sense of peace came over her. Everything was going to be ok. So what if she was suckling at her sister's breast? Nothing mattered, everything was fine. Maybe she had been her sister before, but she could be her Mommy now if that made her feel better.

She tasted something sweet on her tongue, and swallowed it without thinking, lost in a puddle of bliss. It was just a little bit, maybe a drop, but it was enough to deepen her feeling of serenity. She barely noticed when her Mommy moved her mouth to the other breast where she suckled just as strongly. The nipples felt bigger today, longer. Like they had adjusted for the adult mouth greedily sucking at them. Both Elizabeth and Megan felt a completeness come over them, the twin thoughts in both their minds whispering that this was how they were meant to be.

Megan looked down at her older sister, suckling like a child at her nipple, and felt a twinge of desire. She knew this wasn't how they'd always been, but something about dominating her older sister like this was making her wet. She reached down into her panties and felt her wetness as her sister peacefully sucked away. She was more aroused than she had been the first time. She'd have to take care of this later, she told herself.

Elizabeth passed out asleep with her sister-Mommy's nipple in her mouth. Megan tucked her in, and kissed her good night on the lips.