Adultery My Mom & the exchange student

[Penetration]

　"Zihan, I made an agreement with Aunt Chen, Xiaojun will be your wife from now on~" My mother was full of energy, looking at me with her beautiful eyes, full of affection and tenderness.
　　"Uh...Mom..." I stood there awkwardly.
　　"Giggle... Zihan, what's the matter? Don't you like our Xiaojun?" Aunt Chen laughed.
　　"Mom...what are you talking about..." Li Xiaojun patted her mother's hand.
　　"Giggle...Okay, let's go down." Mom looked at me and Li Xiaojun, blushing, and laughed.
　　"Giggle... Zihan, don't be shy, boy, take the initiative~" Aunt Chen is also serious. It seems that my mother and Aunt Chen were discussing the matter between Li Xiaojun and me just now.
　　"Mom...you still said..." Li Xiaojun shook her mother's arm.
　　"Hehe..." A peculiar laughter came from behind me. I turned around and saw that it was Sam. He came to the door silently and without knowing when.
　　"Mom, I've already ordered breakfast. Let's go down and have breakfast!" Sam showed a simple smile and stood in front, looking at us.
　　"Giggle...let's go, let's go!" Aunt Chen stared at Sam, her eyes full of joy.
　　We walked into the elevator together, me at the front and Mom and Sam at the back. Aunt Chen and Li Xiaojun were behind me. What surprised me was that when I got out of the elevator, my mother walked very fast.
　　After finishing breakfast and sending Li Xiaojun and her mother home by taxi, we also took the car back home.
　　As soon as we got home, my mother went straight to the second floor. Looking at my mother's back, I discovered that the black skirt my mother was wearing actually had a zipper on the back. It turned out that the skirt could be locked from the back. I thought the skirt was unzipped from the side.