Yes

Taking a deep breath, you stammer. "N-no..." Granddad stops for a second. "No? Are you sure, honey?" You nod. "I-it's just wrong... and, um, it's not like I ever consented..." He grins. "I understand, don't worry, honey. I'm just an old man, not long for this world. I just wanted to live out some fantasies in my last days and you where one of them... It's not like I have much else left..." You can't help but feel a little bad. "I... I'm sorry, granddad... but even if we ignore how wrong it is, I'm just not ready to have kids yet... Was... was impregnating me your biggest fantasy?" He nods. You sigh. "I'm sorry, but I really can't help you with it."

He smiles. "But, Naomi, you already have." You look up at him confused. "You kept holding your legs like I asked, right?" You nod, "Yeah, why?" Grabbing your tummy, he smiles. "Well, Naomi, I knew you might not go for my plan, so I took some insurances. I'm afraid holding your legs like that doesn't help you relax, but it does trap my seed inside of you." Your eyes widen. "Y-you mean..." "I mean that if you weren't pregnant last night, you certainly are now." You start to tremble. After everything, you still ended up pregnant with your own aunt or uncle. Your grandfather returns his attention to your pussy, his free hand grabbing your breast. "Now the question is, Naomi, are you sure you don't want to try for twins?"