I was unconscious and taken to the hospital. I woke up after a few hours and heard the doctor talking to my mom and dad.
"No serious injuries. But, in the scan, because he hit his head, it seems like he has lost some memory." The doctor said
Mom started to cry.
"When will he wake up?" Dad asked sadly
The doctor replied "he will wake up anytime, so don't worry too much."
Hearing the doc I remember how I was unconscious. It seems I stepped on a pen in my room while I was leaving after Dad woke me up and I fell to the floor.
I hit my head on the bed and lost consciousness. For a second, I thought I would be an isekai protagonist in another world and build a harem with overpowered strength.
'Alas, it wasn't my time to shine.'
I suddenly got mischievous and got an idea to use this opportunity. I woke up after some time and acted like I didn't remember anyone except my mom. And I acted like a small boy. The doctor came and checked me.
"I think your son has temporary amnesia and that's why he can't remember anyone but his mom."
"When will he get back his memories, doctor?" Mom asked as if this were her only chance.
"It takes time, we can't say when. You should be very careful with him. Don't send him to school until he recovers." The doctor replied truthfully.
After a little check-up and making sure that no injuries were left unchecked the doctor let us go with some medicine and suggestions.
The night passed with Mom taking care of me. I slept while hugging her and Dad just slept on the other side. They didn't have the mood to do anything that night.
The next morning after dad left mom woke me up gently as if she was waking up her child.
But then I pushed her on the bed and started to kiss her harder. Mom was surprised at first but quickly responded.
I let her go after 5 minutes. Mom suddenly asked excitedly "Did you remember everything, son?"
"Mom, I never lost memories. I was just pranking you two. I was taking revenge for you two fucking in front of me while giving me blue balls."
"What?" Mom suddenly started to cry and said "Don't ever do this son. I will not be able to bear it."
I panicked seeing her cry. So I started to console her. After 30 minutes of consoling mom finally stopped.
She then got angry and pulled my ear and said "You are now so big that you dare to prank your mother."
"Ouch! Sorry Mom. I will not do it again."
Then suddenly, Mom pushed me on the bed and got on top of me. She started to rub her pussy on my dick and said "Now I will punish you."
She set my dick to her pussy and then sat down. It instantly disappeared inside her. Mom moaned loudly and said "Because of your prank my pussy has been left unattended since last night. You have to make up for this."
I nodded and agreed with her. So we started our fucking session. Mom was very horny. She was after all at the age when women are most active in sex.
In the afternoon we were watching movies naked and kept touching each other. After the movie ended we kissed and Mom went to the kitchen to make tea.
After 10 minutes she returned with two cups of tea and some biscuits. We ate and chatted.
Suddenly I asked Mom.
"Mom, do you want to have sex with Dad in front of me?"
"Didn't we do that? And you have seen it more than once."
"I am not talking about when I was there suddenly. I am talking about whether you want to start and end in front of me. Will you if you get the chance?"
"I will beta. I want you to see me making all the dirty expressions with your dad."
"OK, then don't tell him that I was lying about amnesia."
Mom narrowed her eyes and asked "What plan do you have?"
I smiled at her and told her the plan. Mom listened. After she finished listening, Mom said "You are devious. But I like it. And your dad will like it too even if he finds out about it later."