My stepsister asks me to fuck her virgin pussy with my huge cock while hiding it from the family!

My family decided to throw a party, and my stepsister was bored with her boyfriend, who is a total clown. I told her not to be sad, and she told me that she needed to spend time with a man who would give her some pleasure. I took advantage of the opportunity and told her how good she looked, and she threw herself on top of me! Then she started sucking my cock until it was very hard, and then I shoved it deep inside her while telling her to look me in the eyes and stay quiet so that those celebrating downstairs wouldn't discover us! She milked me dry!