Hi!
It's Emma.
I'm in so deep, and so good...
Mom has had her reservations about Louisa living with us, but Louisa has been so good. Even Mom has to admit that the girl is on her best behaviour, and she's really trying to be better.
The dynamic between the three of us has been like Louisa is part of the family; given her age, it's like I'm a defacto mother to her. It's not official, but it feels that way, except Louisa and I exchange sexual favours, which you wouldn't expect from a mother-figure.
Mom has been slowly warming up to Louisa, though; which, given they matched on the dating app, isn't shocking that there's some mutual attraction there on some basic level, but it's been getting quite flirty. Mom has been spanking Louisa, hugging her from behind, fixing her hair, bossing her around; like a fifties husband with his housewife, letting Louisa know her place.
I came home this evening to Mom eating out Louisa right there on the couch in the lounge, and I said, "Finally getting it out then?"
Mom said back, "That's cheeky of you, Emma. Sit yourself down, and I'll get to you."
I was cheeky, and probably expected a bit of a telling off for that moment of disrespect. I obeyed, and watched Louisa getting a good seeing to with Mom's tongue tiredly dragging around the teen's crotch. I was feeling steamed down there from being at work all day, so I undressed to allow air to circulate coolly around the area.
Mom looked back at my nude appearance with a playful smile before redoubling her efforts on Louisa. I could see her mood was noticeably more enthusiastic about such play than she normally would be, not being as coy around me with a sexual partner as she might be. Mom made no objection to me being more relaxed either.
Though I was naked and aroused, I didn't dare to play with myself, instead just watching Mom and Louisa play. That it was Mom I was watching made it feel all the more tantalising, like it was forbidden but incredibly desired, and having Louisa being an outsider to our family made everything doubly dangerous.
Mom turned to me, deeply inhaling hot currents of air wafting from my crotch, and checking the soakage there, grabbing Louisa as she said, "Be a good girl, Louisa, and tend to this mess," thrusting her head hard against me, almost uncomfortably so as I felt her teeth scraping against each end of my slit.