Inside her pussy

Phil thrust forward, his cock pressing deeper than before. He felt his orgasm crash over him, and his hands held her hips tighter than before as the first spurt of sperm laden cum squirted directly on Alex's cervix. The girl obviously felt it, and just as obviously knew what was happening, because she tried to surge forward, away from her dad's cock, but the only result was Jay's cock popping into her throat. The pressure proved to be too much for the old man, and he threw his head back, holding her head down as he started cumming into her throat.

Alex was trapped between cumming cocks, unable to move, trying not to inhale her grandfather's cum, helplessly feeling her father's sperm filling her womb. She didn't struggle, knowing that would be pointless, her brilliant mind struggling to remember when she last had her period. Then Jay let her head go, and she pulled her mouth off her grandfather's cock, coughing.

"God, that was fantastic," Phil breathed, pressing his hips again, holding hers still.

"You... you should have pulled out dad," Alex panted.

Jay opened his eyes. "You came inside her?" he asked, unbelieving.

"Yes, I did," Phil responded, looking at his father in law. "And I'm going to be the only one doing so, understand?"

Jay swallowed and looked at Phil, nodding.

Alex looked over her shoulder, her dad's cock still inside her, and realized he wasn't only referring to the load of sperm already in her womb - he was talking about doing this again and again.