Grab his sister

John stood up and grabbed his sister's shoulder and turned her to face him. "I think you should taste some fresh stuff just to compare the taste withwhat you just tasted?" he sugested.
Kelly smiled and responded "What you want a blow job from your sister?"
"I just think it would be a good idea if you finished what you started." he said.
Kelly looked down at John's cock. She reached out and stroked it a moment ago it had started to lose the erection but only after a few strokes it was at full erection again.
John put his hands on Kelly's shoulders and pushed her gently down wards.
Kelly did not resist as she slowly dropped to her knees. John's cock was still in her hand and she took the head of it in her mouth. She started sucking.
This reminded John of what his mother had been doing earlier.
His mother had been better at sucking cock. But seeing his cute little sister's face and his cock in her mouth.
His mother had pushed him on to his bed and fucked him at this point. But his sister kept sucking and then he started cumming in her mouth.
She pulled back and her face was covered in his cum.
Kelly then stood up and walked away.