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Elsa and Anna have gotten good at this. After months of sneaking around behind their parent's backs and sneaking kisses whenever possible, they had a schedule set and rules to follow. They knew that their uptight parents would disapprove of their late-night activities, so they switched off which room they met in every night. On odd days like tonight, Anna heads over to Elsa's room. They always have to be careful and meet a few hours after their parents head to bed. They wait up for each other and try to be as quiet as possible.
This night started like any other. Anna was always so excited and bubbly that the usually stoic Elsa had to remind her to settle down. They started with a kiss, and after being together for so long, they no longer remember who initiated it. After a while, they were no longer content with keeping their relationship to just a simple kiss. That first night they waited until their parents were out of their house. Agnarr had to travel on a business trip, and Iduna decided to tag along. They said they would make a romantic weekend of it and left Elsa and Anna home alone. They knew that this was the perfect moment, and it gave them plenty of time to explore and experiment.
Elsa knew she wanted her younger sister. She's known it for a while now and was excited to finally get the chance. She also was nervous because she had to make Anna's first time special. She couldn't stand the idea of somehow ruining it for her. Her first time was less than ideal, so she pulled out all the stops for their first time together. They had planned on going to dinner and a movie first. This wasn't necessarily their first date, but they were just as nervous. They both sped their way through dinner and decided to skip the movie. Elsa had picked out a light blue lingerie set after Anna said she liked the color on her.
Anna hadn't been able to sneak out to buy the lingerie she wanted and was terrified of getting caught. She decided to wear whatever she had on hand as long as it matched, leaving her in a simple black bra and matching panties. They were both so eager they barely looked at what the other was wearing before they were stripping it off. Elsa pressed wet kisses against her heated skin, and eventually, Anna fell asleep cuddled in Elsa's arms. They both had the entire weekend, which leads to Elsa fucking Anna against every available surface in their house. On Sunday night, they had to sleep in their beds. Anna tried to use her puppy eyes to get Elsa to give in, but they both knew the risk was too significant.
After that, they couldn't bear the idea of staying apart. The sisters would sneak around but were always too afraid to get caught. There was no way they could wait until the next business trip their parents went on. That's when the nightly visits started. Usually, it was Elsa taking the risk of sneaking over. Anna almost always fell into a deep sleep in her post-orgasm glow, making it difficult for her to go to Elsa's room and get back before their parents woke up. She naturally was a light sleeper and was able to wake up a half-hour before Iduna's alarm went off and made it back to her room. Eventually, Anna got tired of constantly feeling like Elsa was taking all the risks and doing all the visiting. Elsa tried convincing her that her reasoning made no sense, but the stubborn redhead refused to budge. They worked out their even and odd schedule, which finally appeased Anna, and she felt like they were equal.
Eight months later, they had settled into their routine and tonight started like any other. Anna came over like she always did and fell asleep in the slightly cooler arms of Elsa. Elsa awoke with a start at the sound of an alarm she'd recognize anywhere. Iduna would be up any second, and Anna was still naked, wrapped in her arms. When she tapped the shoulder of Anna, she noticed something strange. The redhead's normally more auburn hair was too dark. Elsa's arm, for that matter, was less ghastly white and colorless. She was even more confused when Anna grumbled and turned over for one last kiss before she left. Staring back at Elsa was the face of their mother Iduna, and staring back at Anna was the face of Agnarr.
They both screamed and scrambled away from each other.
"Dad?" Anna asked, confused.
"Mom?" Asked Elsa at the same time.
They both stared at each other wordlessly while they tried to work out what was happening.
Their screams seemed to have woken the other members of their house, and in walked their naked bodies.
"What the fuck is going on?" Their mother's voice shouted from Anna's body.
Anna jumped at the sight and asked, "Mom?" while staring at her own very nude body. Her scared jolt made her realize that something was protruding out from her hips.
She looked down and shrieked at the sight. Attached to her hips was a series of belts, and the straps held up a purple silicone dildo. She was wearing a strap-on. Specifically, she was in her mother's body, and it seemed like her mom fell asleep last night while wearing a strap-on.
Iduna stared down at Anna's hips. Her face was a bright scarlet, and she blubbered before Elsa helpfully supplied, "If you peg dad, it's fine."
"At least we're not related," she replied, effectively shutting her up.
"I guess you're going to want to talk about that," she said
Their mother just nodded her head before turning on her heel and leaving.
"We'll be waiting at the dinner table," she called back over her shoulder.
Elsa audibly gulped while turning to meet Anna's eye. They both shared a look before starting to get dressed. Anna undid the straps and tossed the strap-on on the bed while holding it as far away from her body as possible. They quickly grabbed whatever clothing would fit their new bodies and started marching to the dining room. The air around them was melancholy, which was more appropriate for a march to the gallows than a walk to their dining room.
They sat around the table in silence. No one wanted to be the first to break the silence because they feared Iduna or Anna would bring up their deepest-held secrets first. Eventually, the bubbly Anna couldn't handle staying quiet anymore.
"I'm sorry, but what's pegging?" She asked. Elsa chuckled while both parents visibly blanched.
After a few moments of silence where it seemed like neither parents were willing to confront this, Elsa finally broke the silence. "Well since they're not going to answer, pegging is when a man and a women love each other very much and the man decides that-"
"Thats enough Elsa" Iduna cuts her off. "We'll discuss that later. After we're done talking about what you two have been up to."
It was now time for Elsa and Anna's faces to flush. In the confusion of waking up in their parent's bodies, they forgot the position they fell asleep in last night. Anna had whined when Elsa tried to pull her fingers out and begged her to leave them in because she loved the feeling of being full. Elsa promised she'd pull out as soon as Anna fell asleep but ended up falling asleep before she got the chance to.
She couldn't help but laugh at the realization that her mother woke up fingering her dad.
"Seriously Elsa, now really isn't the time."
"I'm not the one pegging dad."
That effectively silenced the table.
Agnarr, who had been quiet the entire time, finally spoke up, "Iduna just let them be."
"How can you even say that right now?" she replied. "You saw what they've been up to."
He gave her a look, trying to get her to understand, but she seemed to miss it. As she was about to speak up, he said, "Iduna they've held their secret and we have ours. Its out there now and none of us really want to have this conversation. Just let it go."
"Oh alright," she replied.
"Now can we talk about the body swap?" Anna asked.
Iduna just nodded and said, "Yeah that's something alright."
"Does anyone have any suggestions on how to fix it?" Asked Elsa.
Agnarr suggested they see the trolls, which they all agreed to.
A quick trip down ended with a shrug from the trolls. Their suggestion was to wait it out and see what happens. They fell asleep in the beds they woke up in but much more clothed. The following day they awoke to realize their bodies had swapped back.
Iduna decided that since their bodies were back to normal, they needed another family discussion.
"We won't forbid you from seeing each other," she started, which lead to a collective exhale from Elsa and Anna. Elsa reached under the table and grabbed Anna's hand, squeezing it. Since announcing the discussion, they'd both been nervous that they wouldn't be allowed to see each other, so this revelation was a huge relief.
"That doesn't mean you get free rein of the house. You guys can keep doing whatever you're doing, but keep the PDA to a minimum outside of the house. We don't need the neighbors talking and we'd like to keep up appearances. Anna also has to keep her own bedroom" this lead to a grumble from Anna. She knew she'd miss cuddling with Elsa.
Iduna sighed. "Please let me finish. We will be getting Elsa a bigger bed so you can stay in their and move stuff over, but we think it'd be a good idea to keep your own personal space and it'd help with keeping up appearances."
Elsa and Anna both grinned at each other before Anna lept to her feet and threw her arms around Iduna's shoulders. "Thank you thank you thank you. We'll follow all your rules and do whatever you say," she shouted. Iduna just chuckled and held her youngest daughter. She knew that they'd only follow the rules for a week or two before she'd have to remind them like usual, but she was hopeful.
Anna went back to her seat but pressed a quick peck to Elsa's lips before sitting, leading to Elsa's cheeks burning up.
Iduna sighed. Anna lasted three minutes which was less time than she thought possible.
"Sorry! I'll follow the rules starting now but I do think its unfair that we can't at least kiss or hold hands or cuddle around the house. We haven't even once brought up the strap on or pegging," Anna rambled before clasping a hand around her mouth once she realized what she said.
Now it was time for Iduna and Agnarr to blush. They both shared a look, and Agnarr gave her a silent nod. They seemed to be communicating nonverbally.
"Fine. PDA around the house is okay as long as that is never brought up again."
"Deal" Anna shouted before sticking her hand out to shake as if she agreed to a contract.
Iduna begrudgingly shook her hand. Elsa grabbed Anna and pulled her into her lap before the redhead could make any other remarks.