Author's note: This is a chapter in a series that will include themes of fauxcest (daughter with adoptive parents), mommydomme, and embarrassment. Please do not read if such themes offend you, or if you can't enjoy the silliness of the premise, and I'd advise you to start from the beginning if you haven't read the preceding chapters! All characters in this story are 18 or over.
This is part of the 'Sapphire Lane' universe which is a collection of various series all set on Sapphire Lane, each lesbian related but exploring different kinks.
Chapter 9
"Bébi, are you awake?"
Cassidy drowsily opened her eyes to find her adoptive mother sat on the side of her bed. It was Wednesday morning, the tenth day in her new family.
"Yes mommy, what time is it?" The eighteen year old yawned.
"After breakfast sweetie, normally you would have come down an hour ago so just thought I'd check you're okay."
Cassidy looked over at her alarm and realised she hadn't set it the night before, thinking the spanking from her mom, the aloe vera cream massage of her sore butt by her mommy, and the pillow humping orgasm had all caused it to completely slip her mind.
"Oh sorry, I overslept, is mom gone to work yet?" The teen asked, suddenly concerned as Sarah was accustomed to her coming down at breakfast to wish her a good day at work, so she didn't want the woman to think she was now snubbing her out of revenge for her spanking or something.
"No she's actually working from home today... I'm going to visit an old school friend in another city so will be leaving soon and shall be staying overnight but mom will look after you and it'll be a good opportunity for you two to bond some more without me."
Though Cassidy was relieved Sarah hadn't left for work so she could explain her absence at breakfast, she was a bit nervous at the news she would be left alone with the stern woman without her doting mommy there, thinking back to their last bit of mom and daughter bonding time where she was taken swimsuit shopping, and made to publicly try on several skimpy bikinis before having to agree to an embarrassingly girly Disney princess one-piece swimsuit. Then there was the spanking the evening before... but she was hopeful that, with her cooperation regarding both the swimsuit and the punishment to her rear end, she had ingratiated herself with the blonde.
"I'll just take your temperature in case you're poorly..."
"Oh don't worry, I just overslept because I forgot my alarm."
"No it's okay, we've better make sure. I'll fetch a thermometer." Zafira insisted and Cassidy waited in bed for the woman to return with the device as well as a little bottle of something. The teen opened her mouth ready to have the glass thermometer put inside but instead the woman told her to pull down her pyjama bottoms.
"Pull down my pants?" Cassidy asked confused.
"Oh I forget you Americans usually take temperature readings orally, but we do them rectally and it is a far more accurate method... just think of how your butthole is more of an internal orifice than your mouth so more likely to better reflect your body temperature. And it's not like you have any reason to be shy in front of me!" The Hungarian woman explained as she shook the thermometer until its measurement returned to zero.
The teen guessed she had no choice, though as she didn't believe she was ill, she thought that orally, even if less accurate, would be sufficient. Nevertheless she pulled down her pyjama bottoms and rolled onto her tummy so her mommy had a view of her plump teen butt, thinking after all there wasn't really any part of her that the woman hadn't seen by now, having even previously shaved her around her anus though she would rather not have anything, even the thin glass thermometer, inside her rear entrance.
"I'll use plenty of lube so it isn't uncomfortable..." Zafira said, squirting some onto her hand from the bottle and rubbing her palms together to warm the cool gel up before wiping some over the teen's wrinkled butthole, massaging it in which Cassidy couldn't deny felt kinda nice. She then wiped the rest over the tip of the glass thermometer so it was slick and lubricated before gently pressing it against the girl's asshole, tenderly pushing it against the tight speck of the teen's butthole before it slowly slide inside. Cassidy gasped at the strange feeling, her anus stretched around the thin glass tube of the thermometer which her mommy slowly pushed in a couple of inches so the tip passed through the girl's anal canal and into her rectum.
"How does that feel?" Zafira asked, leaving the thermometer inside of the girl, the glass tube sticking up from between her buttocks.
"Feels pretty weird." Cassidy said, not used to having her asshole stretched around an object, even one so slim as the thermometer.
"Aww don't worry, I'm sure you'll get used to it after a few times..."
Cassidy hoped that the rectal temperature taking wouldn't be something that occurred often enough for her to get used to it, but then again she hadn't expected that simply oversleeping would lead to her mommy inserting something into her butthole.
"Hold it for three minutes now to ensure we get an accurate reading as if we remove it too quickly it'll give the wrong temperature." Zafira explained and they waited, Cassidy feeling that time seemed to pass very slowly while you were led on your belly with a device sticking out your butthole.
"I can't get over how cute your butt is!" The woman said, caressing her hand over one of her daughter's buttocks as they passed the three minutes, and Cassidy blushed, coming to enjoy the compliments but thinking she wasn't in the most dignified position to receive them.