Elizabeth Resists, or tries to anyway.

As she stood in her bedroom and primped her long blonde pigtails, Elizabeth's internal voice piped up that maybe this whole thing was going a little far. In the past month, she'd gone from sleeping at Megan's house once in the first week, to practically living here full time. She hadn't seen Jeff in over a week, and they now mostly communicated through emojis and 'sexting' which she didn't realize was a thing until she saw an article about it on social media.

Maybe it was the fact that she now thought of her little sister more as 'Ms. Hastings' than as Megan now.

Maybe it was the fact that she found herself wearing tartan skirts, pink tshirts, and floral patterned denim miniskirts, 7 days a week. Her closet had started to look like an oversexed schoolgirl's.

Maybe it was the fact that after she continually forgot to clean the house during the day, her sister had started to simply asked her to take out the trash and clean her room.

No, she knew what was really bothering her inside. Last night, while they were having sex on what she now thought of as Jeff's bed, Jeff had been holding her pigtails like handlebars and pounding into her from behind, bringing her to the crest of a delicious orgasm, when he'd slipped and called her Lizzie.

She came so hard she'd passed out.

She didn't know what disturbed her more about that: she'd instantly turned into a ball of electricity surrounding his cock at being called Lizzie by her husband, or that he'd immediately cum as well, and then repeated in her ear over and over as she faded to black "I love you Lizzie-bear."

Just thinking about it now, she was getting wet all over again. What was this whole situation doing to her? Was it awakening some secret desire, secret fetish that she didn't realize she had? Did she deep down, want to be treated like an airhead teenager who wasn't anything but a good fuck?

I have to stop this, she resolved. I have to stop this before it goes any further and I do something I can't undo.

Jeff had left early that morning, and Elizabeth was alone in the house. She noticed it was already past her normal time to leave for work, and panicked. She was going to be late for work and Ms Hastings would be angry with her. She threw on her pink tartan mini, tight midriff baring white polo, and pulled on her white knee high stockings and black heeled mary janes, and raced out the door. She'd forgotten to put on her underwear in her hurry to get out, but she reasoned it was more important to be on time than anything else.

Elizabeth turned her key in the lock at Ms Hastings front door and let herself in. She could hear Ms Hastings in the home office, loudly yelling about something on the telephone, but she was so rushed that she didn't pay any attention.

She called out "Hey Missus H, I'm like, back!" and darted into her room. She had been practicing her airhead valley girl slang, and knew she sounded like an uneducated bimbo, but reasoned to herself that it was a part she had to play if no one was to find out that she was really Ms. Hastings' older sister. Today she was supposed to clean her bathroom, which was always disgusting.

Ms Hastings met her in the living room as she was getting set up. "Lizzie, what is the meaning of this?" she spat.

Elizabeth rolled her eyes, "what now? I didn't do shit."

Ms. Hastings huffed. "You were supposed to come home last night. Now you come home dressed in the same clothes and smelling like sex! I know you were sleeping with Jeff again. We've discussed this and as long as you are living in my house, you will obey my rules. You are not allowed to stay out overnight without permission. You have to be punished, girl."

Elizabeth grabbed the short hem of her skirt and tried to tug it down, looking at her sister's feet. She felt shame at having disobeyed her little sister, something that felt strange and natural at time same time.

As Ms Hastings stormed over, Elizabeth noticed her sister was wearing very high heels. They made her legs look very attractive.

"I... I'm like super sorry, ma'am."

"Your diction has gotten atrocious too." Ms Hastings said, knowing full well that it was she who instructed Elizabeth to speak like this. "You have a choice, girl. You can be punished here and now, or I can take it out of your allowance. Choose quickly."

Elizabeth was about to blurt out an answer, but hesitated at the last second. Was she really about to let her younger sister punish her like some kind of kid? Since when was her paycheck an 'allowance'?

Elizabeth frowned and shook her head, trying to clear the cobwebs. "No, no this isn't right. I'm not going to let you punish me, or whatever. I'm I'm an adult, not some little kid. I think I need to go home."

Ms. Hastings laughed angrily, "My dear Lizzie, sometimes I wonder if you're really even mature enough to be treated like a teenager. An adult? Hah! You can barely even keep your room clean."

Elizabeth felt a **** pushing on her mind, like a pressure building and forcing everything to the back. She pushed back as hard as she could.

"No, no that isn't right. I'm your older sister, I should like, be in charge and stuff. Something is wrong!" She rubbed at her temples, "My head is hurting, like, a lot!"

The pain increased as she fought to hold her thoughts together. Tears formed in her eyes, and she trembled.

Ms. Hastings' angry look disappeared. "Oh my poor little girl. Come here, let's sit down and rest. I'm sorry I was cross with you." She led Elizabeth over to the sofa and hugged her as they sat down. "There there. Mommy's here."

Elizabeth cried from the pressure in her thoughts. It was so hard to keep pushing back. "No, no, no, no, no" she muttered to herself as Ms. Hastings held her. Her eyes were clenched shut as Ms. Hastings cradled Elizabeth's head in her arms. She felt skin pressed against her mouth, and a nipple poked at her between her lips. Focused on trying to push back against the bubble in her mind, she instinctively opened her mouth slightly, and the nipple went in.

It sat there in her mouth, sitting against her tongue for a few seconds as she tried to process what was happening, but her thoughts wouldn't register. All that she was left with was instinct. She took a gentle first suck on the nipple. Nothing came out of course, but she thought she felt a tiny bit of pressure recede in her mind. Tentatively, she sucked again. The pressure retreated just a slight bit, she was sure.

Relief at finding a way to minimize the pressure, her focused turned to sucking at the nipple in her mouth. Sucking harder and harder, she tugged the nipple between her lips and onto her tongue. Her thoughts cleared and she felt peace wash over her. She opened her eyes and looked up, a bare breast and her younger sister's face greeted her, smiling down.

"There there, don't worry, Mommy's got you. Did my boobie make you feel all better, Lizzie? I thought it might calm you down."

"Wha... what's going on? Why..." Elizabeth's voice trailed off, confused at what had just happened. This wasn't her Mommy, this was her sister, Megan. She was sure of it. Her mind felt more at peace, but cloudy. Everything was jumbled.

As she looked up, she felt the pressure on her thoughts start to fight back a little, and a stab of pain from it made her wince.

Ms Hastings moved Elizabeth's head back to position in front of the nipple, and moved it into her mouth again. Elizabeth suckled again, first curiously, then with a hunger. The harder and longer she sucked, the more her mind cleared of any pain or angry thoughts. She felt peace wash over her. This wasn't normal, but she felt better in this moment than she could ever remember. Her body was mostly limp, her head held by Ms Hastings, who might be her sister or her mommy, or something else. She wasn't thinking about that just this moment. She wasn't thinking at all.

After a half hour of suckling on her sister's tit, Elizabeth fell asleep, relaxed and dreaming.