He catches his sister touching herself and decides to please her
The girl was masturbating looking at her cell phone in bed, when suddenly her brother opened the door and caught her. At first she didn’t notice, but soon after he got closer and she noticed. Although he tried to hide what he was doing he couldn’t, what he had managed to do was make him really horny. He stripped her naked and put his cock in her face so she could eat it, of course she did. Then he got on all fours and entered her. He fucked her until he came all over her tits, his sister discovered that fucking was a thousand times better than touching herself like she did, even though it was her brother who had given her the cock.