Knocked Up My Sister On A Road Trip With Our Parents

“Hey bro,” Cora said as soon as our parents’ shut the car door, heading off to get gas and supplies. “I bet I can make you cum before they get back.” She removed her seatbelt and shuffled closer, placing her hand on my thigh and giggling maniacally. My nineteen year old sister was always such a flirt, and I knew she was a bit sex-obsessed, but that was crazy even by her ridiculous standards.