Yes, he mounts her.

Mark shrugged and pulled his pants down letting his erect cock free. He got down behind the girl and rubbed his fat cock head up and down Julie’s wet pussy. She was soaking wet in her sexual excitement and Mark lined his hard cock up at the entrance to her fuck hole.

Julie moaned loudly as she was turned on by his cock rubbing against her labia and clitoris. Her nipples ached they were so hard, and she was ready to be fucked vigorously. Mark thrust hard and mounted her to the balls in one firm stroke. He saw her parents watching as he began to fuck their daughter.

Her mother went down on her knees beside Julie, her mouth close to Julie’s ear and she could see her whisper something into Julie’s ear. Paul unzipped and pulled out the biggest erect cock that Mark had ever seen. He got down behind his wife, pushing her skirt up to allow him to fuck Julie’s mother while they watch Mark fucking their daughter.

Mark could not believe how weird the whole scene was but mostly he was enjoying plowing Julie’s pussy. She was wet and tight, her body humping back against him as he stroked his cock into her. Julie was grunting softly as he fucked her, and he could see her hand slide back so she could rub her clitoris as he pounded her. She started to orgasm quickly, and her hips bucked against him as she moaned loudly, “Fuck yes, I’m cumming. Keep pounding me with your hard cock. Give me your sperm.”

Mark was ready to oblige her, and he plowed deeply into her and ejaculated, his cock spewing strings of cum into her waiting wet pussy. Mark could not believe how good it felt, easily the best fuck of his life, even given the very odd circumstances.

Julie pulled away from him, her pussy leaking Mark’s cum. She said, “Let me suck your cock and make you hard so you can fuck me again.”

Paul pulled out of his wife before cumming and said, “You can give mother a ride if you like. I’m going to tit fuck my daughter.”