Naughty and brazen! 19 year old friend of niece took advantage of

My niece was visiting me with her boyfriend, she was not lounging on the sofa. My car is currently in the workshop, I asked him if he could drive me to the lake, he said that he didn't feel like it and had me beg. If I fuck him he would do it. Asked him if he was serious, and he only yes because your niece can hardly fuck and he had to releases the pressure. I said, ok but only if it stays between us. He fucked my pussy and sprayed his young sperm on my pussy.