As a matter of principle, Dan refuses to fuck his daughter or any other family female. The nearest he's comfortable with is to 'sperm' them - squirt his seed from outside into their open pussies. Any missed shots he obligingly wipes up with his knob and pushes inside. Of course, the girls can get just as pregnant this way as any other.
When a young widow and mother of two fecund daughters learns that her brother-in-law, despite a refusal on principle to commit incest, has managed to impregnate his own daughter, she thinks he might still be the man to knock up his nieces. And maybe her, too. A sequel to 'Sperming My Girl'.
A follow-up to 'Sperming My Girl' and 'Sperming My Nieces'. Dan won't fuck closely-related females because that would be incest. 'Fucking' he defines as sliding his cock in and out of them until he cums. But jacking off and squirting into their open pussies is okay, in his mind. Of course, the women still get pregnant, and when Valerie, his sister-in-law comes to stay, she's quite happy for him to sperm her pussy too.