It excites fucking your half-brother when mom is at home

I have noticed that on several occasions my half-brother I spied. And even once I saw him masturbating. And from that day onwards I could not stop thinking of his cock. I did not know that his penis was so big. I like the adrenaline, do extreme things to feel more pleasure with sex. And once I wanted to see if my step-brother was able to fuck me in front of my mother. And I was not disappointed. I wanked in the living room in front of him. My mother was around and it made him nervous, but not stopped him. He put his hand in my pussy and I masturbated. And when my mother went in the room, we took the opportunity to fuck in the living room.