Adultery My Mom & the exchange student

[Penetration]

"Hmph! Hurry up and teach me how to do the questions." 
　　"You are so fucking shameless! I'm not your boyfriend anymore. Ask your boyfriend to teach you!" As I said that, I put the book in my collegebag and wanted to go home. Li Xiaojun's attitude makes it embarrassing to stay here. 
　　"Don't leave!" Li Xiaojun turned around and looked at me, pouting, his eyes full of grievances. 
　　"..." I frowned.
　　"Teach me and I'll give you a mouth." Li Xiaojun said without changing his expression. 
　　"Also, I know what you and my mother were doing outside just now." 
　　"Fuck..." I swallowed awkwardly. 
　　"If you dare to leave, I'll tell Aunt Lin that you bullied my mother." Li Xiaojun pouted and said like a naughty boy. 
　　"...You..." I was immediately taken advantage of by her. If Li Xiaojun really told my mother, then I would just disappear from the earth. 
　　"Okay, I won't leave, but tell me, is it because Sam put that thing on you and doesn't allow you to have sex with me?" "..." 
　　Li Xiaojun was silent for a while. 
　　"Yes..." Li Xiaojun still admitted. Although I don't have much feelings for her anymore, and Li Xiaojun didn't admit our confession during the National Day outing, I still felt a deep sense of betrayal at this moment. 
　　"Even if I am your girlfriend, I still have the right to choose who to have sex with. We are not legal fathers, so this is none of your business, it is my own." Li Xiaojun was calm and composed, as if he had known this scene would happen. 
　　"You...you are awesome!" Although what Li Xiaojun said seemed to make sense, I felt that my three views were also shattered. 
　　"Stop talking, tell me the topic quickly, and I'll give it to you after I finish. No debt, no debt." Li Xiaojun looked up at me, with some indescribable strange feeling in his pure and beautiful eyes. 
　　"Hmph! Let's first say that you don't tell my mother about me and your mother." I snorted coldly. Although I didn't know that Li Xiaojun knew what Aunt Wen and I did on the sofa, but since she said it, she must Got it. 
　　"No." Li Xiaojun said coldly. 
　　"Also, I don't want your mouth anymore!" I looked at Li Xiaojun disgustedly. The stainless steel underwear under her butt was definitely worn by Sam. She definitely didn't want to share Li Xiaojun's body with me. 
　　However, I am Li Xiaojun's boyfriend, and Sam also knows that this guy is really too much. 
　　"It's up to you..." Li Xiaojun turned around and remained indifferent.
　　Seeing Li Xiaojun's appearance, I had no choice but to swallow my anger and start tutoring her on her homework. 
　　After twenty minutes, I couldn't bear to feel nauseated and sat with Li Xiaojun, so I got up and excused myself to go to the toilet. Li Xiaojun didn't reply and let me go out. 
　　Looking at her like this, it would be nice if I just said go home. 
　　Thinking about it, he went to the toilet and passed by the kitchen with the sliding door closed. The sound of Aunt Wen cooking could be heard inside. 
　　After using the bathroom, he didn't want to go back and see Li Xiaojun's stinky face, so he opened the kitchen door and walked in.