My extended family drove out of town for a little Thanksgiving trip. Sitting on my father's lap in the backseat, I was trying to maintain the balance. I felt so embarrassed because my tits kept bouncing with each jolt, drawing uncomfortable glances from my uncle and cousin seated next to me. As the car lurches over another pothole, I felt something firm pressing against my pussy lips. Realization dawns, bringing a rush of confused emotions. I shift awkwardly, but there's nowhere to go… The friction intensified as the rough road continued. Almost instinctively, I begin to move despite the fact that my dad’s hands grip my waist even firmer. Suddenly, he tenses. A muffled groan escapes his lips as warmth spreads between his crotch and my ass. I froze, unsure how to process what just happened. I remained still as wetness seeps through my jeans. The air in the car felt so thick with unspoken tension. I wanted to move so bad but I was trapped. My boobs annoyingly continue to sway prominently with each bump in the road. As we approached the house, I was so embarrassed and I still can’t process our roadtrip….. I checked my phone and saw a text from my dad. Sitting still on his laps, I read it: “I’m so sorry babygirl, I didn’t mean it to happen. Please let it be our secret…”. I felt so embarrassed… because I liked it. My pussy was so wet, I had to put my panties in a washer immediately. My nipples were aching, so thirsty for attention of my dad’s strong hands. I felt to embarrassed to have these dirty thoughts.