Adultery My Mom & the exchange student

[Penetration]

　　Zihan, Sam is leaving. You can drink more today. Mom is taking care of us!" Dad smiled, and mom was on the side. I looked at my father tenderly, but I always felt that my mother was a little disappointed and didn't say much. If it were a normal family gathering like this, my mother would definitely talk a lot. 
　　"That's right!" After drinking for a while, Sam suddenly said. 
　　"What?" I don't know how to drink. After drinking two glasses of red wine, my head started to feel dizzy. 
　　"Zihan, don't you know what day tonight is?" Sam said, looking at me and then at his mother. 
　　Dad was also a little confused. 
　　I looked at my mother and saw that she was a little uncomfortable and her eyes were flickering.
　　"Quiet! That's not right!" Dad looked at mom, and suddenly yelled too. Mom looked at him with some expectation. 
　　"What is it? Why can't I remember it for a moment!" Dad said with some annoyance. 
　　"Hey, let me tell you." Sam said as his father couldn't remember what to say for a while and looked at my mother and me. 
　　"..." Dad also looked at Sam depressedly. 
　　"Today is July 17th in the Chinese Gregorian calendar, mom's birthday!" Sam stood up and looked at his mom with a grin on his face. 
　　"Ah!...Yes, I'll just say what!..." The next moment, my father wanted to say something, but couldn't. He looked at his mother with apologetic eyes. 
　　"Ah, yes, today is my mother's birthday!" I just woke up from a dream. Yes, July 17th is my mother's birthday. I always have my mother's birthday. I remember last year, I was still frugal. I used the saved money to buy flowers and a beige scarf for my mother. 
　　How could I forget my mother’s birthday this year? I looked at my mother reproaching myself. 
　　It must be those bad things that disrupted the rhythm of my life, so I forgot about such an important day as my mother’s birthday. 
　　"Honey, I'm sorry...I've been so busy this year...I even forgot your birthday..." Dad looked at mom with a sad face. 
　　Mom still looked at us tenderly, and I said that I was obviously very happy today, but I always felt that my mother had something on her mind. It turned out that my father and I had forgotten my mother’s birthday. Although my mother was strong and cold, she was also Woman, my father and I didn’t mention her birthday today. She must be very disappointed. 
　　Fortunately, this guy Sam actually said it. No wonder he was so mysterious and didn't tell me during the day. It turned out that he wanted to surprise my mother.